Help needed with rundll32.exe error

[drexbenoit]

I can't change any of my settings because whenever I try it says
C:\windows\system32\rundll32.exe is not a vaild win32 application.

[Berniedog]

See the following links for some help: What's the suspicious Rundll32.exe process?, Not a valid Win32 application or Cannot find the Rundll32.exe file when you open Control Panel
Cheers!