iTunes caused a DLL error that I can't seem to fix.

[square965]

So I went to update iTunes the other day, and somehow during the install of the new update, iTunes decided to screw everything up.

iTunes won't open, WinAmp opens, but does not play media, and Windows Media Player can't play DVDs. Basically, I cannot access any sort of video or music file that I've downloaded.

The error is being caused by a "missing" .dll, POWRPROF.DLL. This .DLL is in fact not missing, but according to all my programs it is:

http://i44.tinypic.com/2jey9up.png

http://i44.tinypic.com/2wh10gp.png

http://i42.tinypic.com/mkwy6w.png

As you can see here, the file is indeed where it is supposed to be:

http://i40.tinypic.com/23t17ra.png

I'm completely lost on what to do, any suggestions?

FYI, I'm running Windows 7 64-bit.

 

[Lexluethar]

Copy that dll from another computer running the same OS.

 

[square965]

Copy that dll from another computer running the same OS.

Tried that, didn't fix anything.

 

[Lexluethar]

A file in windows is corrupt. Try doing a system restore back to a point before this started occuring. If that doesn't work and this is Xp do a repair install, if this is Vista or 7 your only option would be a reinstall.