If you cannot run EXE files

If you've been infected or corrupted and can't run executable (.EXE) program files in order to fix your problem, here's the fix:

http://support.microsoft.com/kb/555067

If that doesn't fix it, using Notepad or any text editor, create a .REG file as shown below.  Name it EXEFIX.REG, or whatever, doesn't matter so long as it ends in .REG:

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\.exe]

@="exefile"

"Content Type"="application/x-msdownload"

[HKEY_CLASSES_ROOT\.exe\PersistentHandler]

@="{098f2470-bae0-11cd-b579-08002b30bfeb}"

Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\.exe]@="exefile""Content Type"="application/x-msdownload"
[HKEY_CLASSES_ROOT\.exe\PersistentHandler]@="{098f2470-bae0-11cd-b579-08002b30bfeb}"

Then double-click on it and answer any prompts that come up.