win32 application error

Looks Your system is infected by virus.
To leave out this situation, you need to read carefully that error message. it may be looks as :

C:\Program Files\myprogram\program.exe is not a valid Win32 application.

Click to expand...

Here program.exe is the virus you need to remove.
1. Open task manager and search out that program.exe in process bar.
2. end the task related with it.
3. open search and search this program.exe in your system.
4. Delete it and all its associated files.
5 restart your system.
***********************************