.EXE Now Associated with Adobe Acrobat!

> BIG HELP! I purchased several MS programs and was downloading the
> programs
> using the Download Manager. OneNote installed just fine. Following the
> same
> process, I attempted to download Groove 2007 next. All of a sudden - I
> saw
> no screens or made any changes to file extensions and associated
> programs -
> NONE of my installed .exe files will open - they all try to open as Adobe
> Acrobat files (which of course they can't, because they aren't!)
>
> I can't run System Restore, because it is an .exe file! No where am I
> given
> the chance to remove that association.
>
> This new computer - with lots of the latest MS programs - is now useless
> because very little will open. Even during start-up, most functions
> (anything with an .exe extension) refuse to open.
>
> I have great anti-virus software and have only been working with official
> MS
> websites and files.
>
> Any ideas?
>
> Thank you!
> ~Deborah