Setup Could not install the following component: .NET FRAMEWORK 4.0 GDR(KB2468871) while installing Windows Phone SDK 7.1

Problem:

This problem comes up when we try installing the Windows Phone Developer through web installer i.e running the setup.exe within the package ( vm_web2.exe ) after extracting it .

Technically the vm_web2.exe is supposed to run directly and install by itself , But in some cases for Ex. if you are installing the developer studio on a Win XP machine(check out the post on how to install on Win XP here) you may have to extract the package. In such a case the setup may fail.

Resolution:

1.  You may have to download the .ISO file from (http://go.microsoft.com/?linkid=9785134) and extract it , edit the baseline file and install it by running the setup.exe.

2. You can follow the steps in the thread
(http://social.msdn.microsoft.com/Forums/vstudio/en-US/b2b566b5-4608-4acd-8815-40282d9ff558/unable-to-install-windows-phone-7-on-windows-7-sp1)


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