0xc000007b Error on Launching Most Apps: "The application failed to initialize properly (0xc000007b). Click OK to terminate the application."

I was trying to fix an error with my Windows Vista Ultimate x64 SP1's OLEAUT32.dll file and thus replaced it with a 6.0.6001.18000 version, but now I'm getting the following error on trying to run most applications:

"The application failed to initialize properly (0xc000007b). Click OK to terminate the application."

I think I'll need a manual fix, because I can't launch many repair utilities.
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travisjbennettAsked:
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florin_sCommented:
try a windows repair using the setup cd
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nobusCommented:
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travisjbennettAuthor Commented:
The problem occured when installing old Visual Basic runtimes on Windows Vista. It replaced a newer version. BAD idea. Always keep the newer version.

I reinstalled the OS completely after a good backup, because I couldn't run anything. Vista repair did nothing, nor sfc. Because I runtime was at fault, I'm going to give the points to nobus's first response, as it was the closest to my problem, but it seems there is no real solution to this kind of problem.
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