diff --git a/configure/os/CONFIG.win32-x86.windows-x64 b/configure/os/CONFIG.win32-x86.windows-x64
index 8c51ef704..d0bcbd4cf 100644
--- a/configure/os/CONFIG.win32-x86.windows-x64
+++ b/configure/os/CONFIG.win32-x86.windows-x64
@@ -10,19 +10,9 @@
 -include $(CONFIG)/os/CONFIG.Common.win32-x86
 -include $(CONFIG)/os/CONFIG.win32-x86.win32-x86
 
-ARCH_DEP_CPPFLAGS += /favor:blend
-#ARCH_DEP_CPPFLAGS += /Wp64
-
-#	/favor:blend	both AMD64 and INTEL64
-#	/favor:AMD64
-#	/favor:INTEL64 (new value)
-#	/favor:EN64T   (old value)
-
 OPT_LDFLAGS += /MACHINE:X64
 
 #	/MACHINE:X64
 #	/MACHINE:IA64  (Itanium)
 #	/MACHINE:X86
 
-#The following option does not work
-#ARCH_DEP_CPPFLAGS += /env x64
diff --git a/configure/os/CONFIG.windows-x64.windows-x64 b/configure/os/CONFIG.windows-x64.windows-x64
index f9144718f..baa1ba945 100644
--- a/configure/os/CONFIG.windows-x64.windows-x64
+++ b/configure/os/CONFIG.windows-x64.windows-x64
@@ -9,14 +9,6 @@
 
 -include $(CONFIG)/os/CONFIG.win32-x86.win32-x86
 
-ARCH_DEP_CPPFLAGS += /favor:blend
-#ARCH_DEP_CPPFLAGS += /Wp64
-
-#	/favor:blend	both AMD64 and INTEL64
-#	/favor:AMD64
-#	/favor:INTEL64 (new value)
-#	/favor:EN64T   (old value)
-
 OPT_LDFLAGS += /MACHINE:X64
 
 #	/MACHINE:X64
diff --git a/configure/os/CONFIG_SITE.Common.windows-x64-static b/configure/os/CONFIG_SITE.Common.windows-x64-static
new file mode 100644
index 000000000..5da06c053
--- /dev/null
+++ b/configure/os/CONFIG_SITE.Common.windows-x64-static
@@ -0,0 +1,11 @@
+# CONFIG_SITE.Common.windows-x64-static
+#
+# $Revision-Id$
+#
+# Site Specific definitions for windows-x64-static target
+# Only the local epics system manager should modify this file
+
+# 64-bit Visual Studio 2010 builds fail when built optimized.
+# If you are using a newer version you can try removing this:
+HOST_OPT = NO
+