[Dup] Not a valid Win32 application

[Celtic Queen]

Sometimes when I try to go into a program I'll get an error message saying 'not a valid Win32 application'.This happens with all sorts of programs,from downloaded emulators to the programs that came with the computer,including MS Paint.
Some times I can open the program I want by going into it from another location,but sometimes not
Please help xxx

 

[Dan O]

Please don't open mulitple threads for the same problem. Closing dup.