Please download exeHelper from one of these two places:
Save it to your Desktop
Vista or Windows 7 users right click the downloaded file and select “Run as Administrator"
A black window should pop up, press any key to close once the fix is completed.
>>Please post the contents of the exehelperlog.txt<<
[It is created in the directory where you ran exeHelper, and should also open at the end of the scan.]
When exeHelper finishes, restart your computer.
See if you can run .exe files now.