http://blogs.msdn.com/windowssdk/archive/2008/03/07/workaround-sdk-build-env-fails-on-x86-xp-with-vs2005.aspxThis article applies to the Windows SDK for Windows Server 2008 and .NET Framework 3.5 . Problem: If your usage scenario matches the one listed below , you will be unable to build in the Windows SDK command line build environment. If you type cl.exe inenCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/windowssdk/archive/2008/03/07/workaround-sdk-build-env-fails-on-x86-xp-with-vs2005.aspx#8174218Thu, 13 Mar 2008 00:10:57 GMT91d46819-8472-40ad-a661-2c78acb4018c:8174218rwishlaw<p>The same problem occurs with version 5.1.2600.3311(xpsp.080212-0005) of reg.exe</p> http://blogs.msdn.com/windowssdk/archive/2008/03/07/workaround-sdk-build-env-fails-on-x86-xp-with-vs2005.aspx#8562737Fri, 30 May 2008 13:23:05 GMT91d46819-8472-40ad-a661-2c78acb4018c:8562737scorpion007<p>Ah, cool -- thanks for posting my bug report here. &nbsp;Didn't realise it was up on this blog.</p>