Update README.txt

winbuild/README.txt

@@ -1,7 +1,14 @@
 Tools needed
 ------------
-1. Visual Studio Express - found at http://www.visualstudio.com/en-US/products/visual-studio-express-vs
+1. Windows 7 (if you are using Win 8 or above, you will need to use a VM Win 7)
-2. Windows SDK - can be downloaded from microsoft.com
+2. Visual Studio C++ 2010 Express - found at http://www.visualstudio.com/en-us/downloads#d-2010-express
+3. Windows 7.1 SDK - http://www.microsoft.com/en-us/download/details.aspx?id=8279
+
+If you intend to build for native x64, then instead of using <Visual Studio Command Prompt>, you will need to use
+Windows SDK 7.1 Command Prompt and run "setenv /x64 /Release" before starting to build anything.
+
+Also, for x64, after you follow all the steps and you are ready to build. Go to "Project Properties -> VC++ Directories -> Library Directories" 
+and add this folder to the library list: C:\Program Files\Microsoft SDKs\Windows\v7.1\Lib\x64
 
 
 Installing dependencies