Hi Stebner,
I tried your methods and, sorry to say, but they didn't work. I uninstalled and re-installed the entire VS2010 package, along with XNA GS, and Windows Phone 7 SDK, which took me several hours, but the problem still existed. Later i found this post
http://forums.create.msdn.com/forums/t/49822.aspx and a reply by '
Kyne96 Games', which solved the problem.
Mine is a 64 bit OS. So what i did was, i executed these two commands in command prompt :
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInUtil.exe" -PipelineRoot:"C:\Program Files (x86)\Common Files\microsoft shared\XNA\PipelineHosting\." -Rebuild
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInUtil.exe" -PipelineRoot:"C:\Program Files (x86)\Common Files\microsoft shared\XNA\PlatformExtensions\." -Rebuild
So thank you Aaron Stebner and Kyne96 Games for helping me out.
Note 1: To execute the commands, type the commands in two separate batch files and open a separate command prompt with administrator privileges and run those two batch files separately.
Note 2: I got few warning messages while executing the second command. If you also get such warning messages, just ignore them. It will work.
Regards,
M.Anand