You can also download exefix_xp.com from here: www.winhelponline.com/exefix_xp.com
This will restore the .EXE file association (it will work in Windows Vista/7 as well).
Once you do that, definitely run an antivirus scanner as DSgamby suggested.
This will restore the .EXE file association (it will work in Windows Vista/7 as well).
Once you do that, definitely run an antivirus scanner as DSgamby suggested.