Error comes out when trying to run programs on Windows

Hello,
I keep getting this error message below:
Aphex.exe – Bad Image
The application or DLL C:WINDOWSytern32oIedlg.dII i not a valid Windowc image, Pleace check thic against your installation diskette.
OK
This always comes out every time I start running programs or games. I'm not a computer specialist, so I really don't know what to do here.
Please help me solve this error.
Thanks a lot.
