diff --git a/ChangeLog b/ChangeLog
index 5c3f9b4..3c8a8cd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,16 @@
 Bugfix
    * Fix to allow building test suites with any warning that detects unused
      functions. Fixes #1628.
+   * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture.
+   * Remove redundant include file in timing.c. Fixes #2640 reported by irwir.
+   * Fix Visual Studio Release x64 build configuration by inheriting
+     PlatformToolset from the project configuration. Fixes #1430 reported by
+     irwir.
+   * Enable Suite B with subset of ECP curves. Make sure the code compiles even
+     if some curves are not defined. Fixes #1591 reported by dbedev.
+
+Changes
+   * Make `make clean` clean all programs always. Fixes #1862.
 
 = mbed TLS 2.7.11 branch released 2019-06-11
 
diff --git a/library/net_sockets.c b/library/net_sockets.c
index 1e737c8..c659d36 100644
--- a/library/net_sockets.c
+++ b/library/net_sockets.c
@@ -274,7 +274,7 @@
     int err = errno;
 
     /*
-     * Never return 'WOULD BLOCK' on a non-blocking socket
+     * Never return 'WOULD BLOCK' on a blocking socket
      */
     if( ( fcntl( ctx->fd, F_GETFL ) & O_NONBLOCK ) != O_NONBLOCK )
     {
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 6dcedd4..51827c3 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -7739,8 +7739,12 @@
 
 #if defined(MBEDTLS_ECP_C)
 static mbedtls_ecp_group_id ssl_preset_suiteb_curves[] = {
+#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
     MBEDTLS_ECP_DP_SECP256R1,
+#endif
+#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
     MBEDTLS_ECP_DP_SECP384R1,
+#endif
     MBEDTLS_ECP_DP_NONE
 };
 #endif
diff --git a/library/timing.c b/library/timing.c
index 8b90383..9ccaf40 100644
--- a/library/timing.c
+++ b/library/timing.c
@@ -50,7 +50,6 @@
 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
 
 #include <windows.h>
-#include <winbase.h>
 #include <process.h>
 
 struct _hr_time
diff --git a/programs/Makefile b/programs/Makefile
index b4a553a..d38b9e7 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -276,6 +276,8 @@
 clean:
 ifndef WINDOWS
 	rm -f $(APPS)
+	-rm -f ssl/ssl_pthread_server$(EXEXT)
+	-rm -f test/cpp_dummy_build$(EXEXT)
 else
 	del /S /Q /F *.o *.exe
 endif
diff --git a/scripts/data_files/vs2010-app-template.vcxproj b/scripts/data_files/vs2010-app-template.vcxproj
index de18f9d8..0d2ca42 100644
--- a/scripts/data_files/vs2010-app-template.vcxproj
+++ b/scripts/data_files/vs2010-app-template.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/aescrypt2.vcxproj b/visualc/VS2010/aescrypt2.vcxproj
index db387f9..63a124a 100644
--- a/visualc/VS2010/aescrypt2.vcxproj
+++ b/visualc/VS2010/aescrypt2.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/benchmark.vcxproj b/visualc/VS2010/benchmark.vcxproj
index 934c844..ffbd1ad 100644
--- a/visualc/VS2010/benchmark.vcxproj
+++ b/visualc/VS2010/benchmark.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/cert_app.vcxproj b/visualc/VS2010/cert_app.vcxproj
index fef0efe..6f1c46e 100644
--- a/visualc/VS2010/cert_app.vcxproj
+++ b/visualc/VS2010/cert_app.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/cert_req.vcxproj b/visualc/VS2010/cert_req.vcxproj
index 7d8694b..1e7edd0 100644
--- a/visualc/VS2010/cert_req.vcxproj
+++ b/visualc/VS2010/cert_req.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/cert_write.vcxproj b/visualc/VS2010/cert_write.vcxproj
index 8891d8a..bed8728 100644
--- a/visualc/VS2010/cert_write.vcxproj
+++ b/visualc/VS2010/cert_write.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/crl_app.vcxproj b/visualc/VS2010/crl_app.vcxproj
index c51caef..9fbd408 100644
--- a/visualc/VS2010/crl_app.vcxproj
+++ b/visualc/VS2010/crl_app.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/crypt_and_hash.vcxproj b/visualc/VS2010/crypt_and_hash.vcxproj
index 99199d9..fb7ef77 100644
--- a/visualc/VS2010/crypt_and_hash.vcxproj
+++ b/visualc/VS2010/crypt_and_hash.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/dh_client.vcxproj b/visualc/VS2010/dh_client.vcxproj
index b2fae80..a0990e1 100644
--- a/visualc/VS2010/dh_client.vcxproj
+++ b/visualc/VS2010/dh_client.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/dh_genprime.vcxproj b/visualc/VS2010/dh_genprime.vcxproj
index d9c1900..fdd6c6f 100644
--- a/visualc/VS2010/dh_genprime.vcxproj
+++ b/visualc/VS2010/dh_genprime.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/dh_server.vcxproj b/visualc/VS2010/dh_server.vcxproj
index 6f87cb8..d1a7345 100644
--- a/visualc/VS2010/dh_server.vcxproj
+++ b/visualc/VS2010/dh_server.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/dtls_client.vcxproj b/visualc/VS2010/dtls_client.vcxproj
index 60715fe..72b2d4b 100644
--- a/visualc/VS2010/dtls_client.vcxproj
+++ b/visualc/VS2010/dtls_client.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/dtls_server.vcxproj b/visualc/VS2010/dtls_server.vcxproj
index 8789d7f..b975369 100644
--- a/visualc/VS2010/dtls_server.vcxproj
+++ b/visualc/VS2010/dtls_server.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ecdh_curve25519.vcxproj b/visualc/VS2010/ecdh_curve25519.vcxproj
index 1120111..748b6d1 100644
--- a/visualc/VS2010/ecdh_curve25519.vcxproj
+++ b/visualc/VS2010/ecdh_curve25519.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ecdsa.vcxproj b/visualc/VS2010/ecdsa.vcxproj
index 3718c9f..03418d0 100644
--- a/visualc/VS2010/ecdsa.vcxproj
+++ b/visualc/VS2010/ecdsa.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/gen_entropy.vcxproj b/visualc/VS2010/gen_entropy.vcxproj
index 4c57655..89b41c0 100644
--- a/visualc/VS2010/gen_entropy.vcxproj
+++ b/visualc/VS2010/gen_entropy.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/gen_key.vcxproj b/visualc/VS2010/gen_key.vcxproj
index a07e1aa..c8ea11f 100644
--- a/visualc/VS2010/gen_key.vcxproj
+++ b/visualc/VS2010/gen_key.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/gen_random_ctr_drbg.vcxproj b/visualc/VS2010/gen_random_ctr_drbg.vcxproj
index 11740c4..64200af 100644
--- a/visualc/VS2010/gen_random_ctr_drbg.vcxproj
+++ b/visualc/VS2010/gen_random_ctr_drbg.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/gen_random_havege.vcxproj b/visualc/VS2010/gen_random_havege.vcxproj
index 01253ce..70c8138 100644
--- a/visualc/VS2010/gen_random_havege.vcxproj
+++ b/visualc/VS2010/gen_random_havege.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/generic_sum.vcxproj b/visualc/VS2010/generic_sum.vcxproj
index 0f2ecb4..21bd90f 100644
--- a/visualc/VS2010/generic_sum.vcxproj
+++ b/visualc/VS2010/generic_sum.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/hello.vcxproj b/visualc/VS2010/hello.vcxproj
index c986b07..b5f6eb0 100644
--- a/visualc/VS2010/hello.vcxproj
+++ b/visualc/VS2010/hello.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/key_app.vcxproj b/visualc/VS2010/key_app.vcxproj
index f96a0b0..0fc246a 100644
--- a/visualc/VS2010/key_app.vcxproj
+++ b/visualc/VS2010/key_app.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/key_app_writer.vcxproj b/visualc/VS2010/key_app_writer.vcxproj
index 0e4af3a..e4ef62b 100644
--- a/visualc/VS2010/key_app_writer.vcxproj
+++ b/visualc/VS2010/key_app_writer.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/mini_client.vcxproj b/visualc/VS2010/mini_client.vcxproj
index b5567bd..3756404 100644
--- a/visualc/VS2010/mini_client.vcxproj
+++ b/visualc/VS2010/mini_client.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/mpi_demo.vcxproj b/visualc/VS2010/mpi_demo.vcxproj
index d68bc75..d770d35 100644
--- a/visualc/VS2010/mpi_demo.vcxproj
+++ b/visualc/VS2010/mpi_demo.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/pem2der.vcxproj b/visualc/VS2010/pem2der.vcxproj
index 507c79a..2f1248c 100644
--- a/visualc/VS2010/pem2der.vcxproj
+++ b/visualc/VS2010/pem2der.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/pk_decrypt.vcxproj b/visualc/VS2010/pk_decrypt.vcxproj
index 5ccaf4f..168adf3 100644
--- a/visualc/VS2010/pk_decrypt.vcxproj
+++ b/visualc/VS2010/pk_decrypt.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/pk_encrypt.vcxproj b/visualc/VS2010/pk_encrypt.vcxproj
index d5ef208..bb09f06 100644
--- a/visualc/VS2010/pk_encrypt.vcxproj
+++ b/visualc/VS2010/pk_encrypt.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/pk_sign.vcxproj b/visualc/VS2010/pk_sign.vcxproj
index d21f17a..98941f4 100644
--- a/visualc/VS2010/pk_sign.vcxproj
+++ b/visualc/VS2010/pk_sign.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/pk_verify.vcxproj b/visualc/VS2010/pk_verify.vcxproj
index 637ddd6..6d3006e 100644
--- a/visualc/VS2010/pk_verify.vcxproj
+++ b/visualc/VS2010/pk_verify.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/req_app.vcxproj b/visualc/VS2010/req_app.vcxproj
index 3ffcea5..992efcf 100644
--- a/visualc/VS2010/req_app.vcxproj
+++ b/visualc/VS2010/req_app.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/rsa_decrypt.vcxproj b/visualc/VS2010/rsa_decrypt.vcxproj
index 9e1d0a2..ffba32a 100644
--- a/visualc/VS2010/rsa_decrypt.vcxproj
+++ b/visualc/VS2010/rsa_decrypt.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/rsa_encrypt.vcxproj b/visualc/VS2010/rsa_encrypt.vcxproj
index c3b0371..9f5f327 100644
--- a/visualc/VS2010/rsa_encrypt.vcxproj
+++ b/visualc/VS2010/rsa_encrypt.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/rsa_genkey.vcxproj b/visualc/VS2010/rsa_genkey.vcxproj
index e6b5060..824e304 100644
--- a/visualc/VS2010/rsa_genkey.vcxproj
+++ b/visualc/VS2010/rsa_genkey.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/rsa_sign.vcxproj b/visualc/VS2010/rsa_sign.vcxproj
index c1147c3..dda4756 100644
--- a/visualc/VS2010/rsa_sign.vcxproj
+++ b/visualc/VS2010/rsa_sign.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/rsa_sign_pss.vcxproj b/visualc/VS2010/rsa_sign_pss.vcxproj
index adfee6d..31da8ca 100644
--- a/visualc/VS2010/rsa_sign_pss.vcxproj
+++ b/visualc/VS2010/rsa_sign_pss.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/rsa_verify.vcxproj b/visualc/VS2010/rsa_verify.vcxproj
index bb44b4f..b78dfc3 100644
--- a/visualc/VS2010/rsa_verify.vcxproj
+++ b/visualc/VS2010/rsa_verify.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/rsa_verify_pss.vcxproj b/visualc/VS2010/rsa_verify_pss.vcxproj
index 7781aa5..220ad2d 100644
--- a/visualc/VS2010/rsa_verify_pss.vcxproj
+++ b/visualc/VS2010/rsa_verify_pss.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/selftest.vcxproj b/visualc/VS2010/selftest.vcxproj
index 12ff76d..1f5e109 100644
--- a/visualc/VS2010/selftest.vcxproj
+++ b/visualc/VS2010/selftest.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ssl_client1.vcxproj b/visualc/VS2010/ssl_client1.vcxproj
index 4ac15822..c36a8ed 100644
--- a/visualc/VS2010/ssl_client1.vcxproj
+++ b/visualc/VS2010/ssl_client1.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ssl_client2.vcxproj b/visualc/VS2010/ssl_client2.vcxproj
index 1d44fa7..727be00 100644
--- a/visualc/VS2010/ssl_client2.vcxproj
+++ b/visualc/VS2010/ssl_client2.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ssl_fork_server.vcxproj b/visualc/VS2010/ssl_fork_server.vcxproj
index 922a995..84c917d 100644
--- a/visualc/VS2010/ssl_fork_server.vcxproj
+++ b/visualc/VS2010/ssl_fork_server.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ssl_mail_client.vcxproj b/visualc/VS2010/ssl_mail_client.vcxproj
index a9b01d0..a89e332 100644
--- a/visualc/VS2010/ssl_mail_client.vcxproj
+++ b/visualc/VS2010/ssl_mail_client.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ssl_server.vcxproj b/visualc/VS2010/ssl_server.vcxproj
index ae28e18..7fb841e 100644
--- a/visualc/VS2010/ssl_server.vcxproj
+++ b/visualc/VS2010/ssl_server.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/ssl_server2.vcxproj b/visualc/VS2010/ssl_server2.vcxproj
index d06e062..36743cd 100644
--- a/visualc/VS2010/ssl_server2.vcxproj
+++ b/visualc/VS2010/ssl_server2.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/strerror.vcxproj b/visualc/VS2010/strerror.vcxproj
index d7ec570..c3ec8fa 100644
--- a/visualc/VS2010/strerror.vcxproj
+++ b/visualc/VS2010/strerror.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
diff --git a/visualc/VS2010/udp_proxy.vcxproj b/visualc/VS2010/udp_proxy.vcxproj
index 30ae55e..e75dd9a 100644
--- a/visualc/VS2010/udp_proxy.vcxproj
+++ b/visualc/VS2010/udp_proxy.vcxproj
@@ -54,7 +54,6 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>Windows7.1SDK</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">