I have the same problem described in following thread:
I'm running Windows 7 x64 Ultimate
I installed the .NET Framework 4 Client Profile and even tried installing the FULL/Extended edition the install appears to go in just fine, no errors or anything. Once I try to run a program it fails to work, I tried to verify my .NET4 installation
using this tool...
It ALWAYS fails the verification no matter how many times I uninstall/clean up and reinstall...
Here is a snippet from the verifier log...
.....[07/22/10,17:35:35] Section [Registry - .NET Framework 4 Full (Wow6432Node)] - stop parsing entries
[07/22/10,17:35:35] Processing custom action 'Custom Action - .NET Framework 4.0 test application'
[07/22/10,17:35:35] ExecutablePath = 'Netfx40TestApplication.exe'
[07/22/10,17:35:35] FriendlyName = '.NET Framework 4 test application'
[07/22/10,17:35:35] TimeoutSeconds = '300'
[07/22/10,17:35:35] WaitOnExit = 'true'
[07/22/10,17:35:35] Silent = 'true'
[07/22/10,17:35:35] Launching process 'Netfx40TestApplication.exe' now
[07/22/10,17:35:35] Process successfully launched. Waiting 300 seconds for it to complete.
[07/22/10,17:35:35] ****ERROR**** Process 'Netfx40TestApplication.exe' exited with return
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