Uninstalling VS.NET 2010 Beta Breaks .NET?

Question

I've been running VS.NET 2010 beta for a couple of months now alongside VS.NET 2005. As late as yesterday afternoon I was using 2005 for work.

Last night I uninstalled VS.NET 2010 and nownone of my .NET-related apps work (VS.NET 2005, SQL Server Management Studio, etc.). The installs for these products won't work, either, nor will the 2.0 SDK or 2.0 Framework installs.

They're all failing with this error:

(Msgbox title) ngen.exe - Unable to Locate Component
This application has failed to start because MSVCR100.dll was not found.  Re-installing the application may fix the problem.

Which, of course, it doesn't, since this is the install.

Any ideas? Google doesn't seem to have anything.

Answer 1

First: Never install a beta on a production machine. Use Virtual PC instead. Lesson learned.

Second: based on the dll mentioned, MSVCR100.dll, I'd say you've compiled against .NET 4.0. Recompile your programs against .NET 2.0 and all should be good.

Answer 2

Randolpho hit the nail on the head. Never install a beta development tool on a production machine. Always use a VM or seperate box.

From the sound of it, .NET registered the new dlls for 2.0, 3.0, 3.5, and 4.0. You might need a registry hack to repoint the framework to the correct location...checking and will report back.

UPDATE

Check the different folders for the remaining versions of .NET at

HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/.NETFramework/{version}/NGETService/Roots

and make sure there's not a lingering reference to the 4.0 dlls.

Answer 3

Problem Solved. The answer is...uninstall .NET Framework 4.0. The VS.NET uninstall doesn't take that with it, and apparently DOES remove the VC runtime dependency

Answer 4

THANKS. Uninstalling .net Framework 4.0 did the job!

Lesson learned for me too, never install betas on a production machine, always use wife's laptop.

Answer 5

Uninstall .NET Framework 4.0 both Extended and Client. It will solve the problem.

Answer 6

Yes thnx........ uninstalling .net 4.0 served the purpose for me as well. I`ll never install a Beta on a production machine..... LEARNED