I'm running Outlook 2003 SP2 and recently noticed that copies of all
incoming email are being placed on the root of my C drive at the same time
Outlook downloads them.

All email is going to my Outlook.pst file, (C:\Documents and Settings\my
name\Local Settings\Application Data\Microsoft\Outlook) just fine. I can
delete the email copies on C without loosing the files in Outlook. If I
delete the message in Outlook, the copy remains on C. No outgoing email is
copied to C.

The copies on C always have an odd file name followed by a single letter or
number file extension, (ex. s32g.3) To be sure these were copies of
incoming email, I renamed one with a txt extension, opened it with Note Pad
and clearly saw that it was in fact the same email message I just received
in Outlook.

I'm running Norton Internet Security 2005 with most current virus
definitions. Also ran the Trend Micro Housecall utility, Ad-Aware,
Microsoft AntiSpyware and MS Malicious software removal tool with none
detecting any viruses or other malicious software on my machine.

Would uninstalling then reinstalling Office clear up this email copying
problem? Or, can anybody suggest where to look for what might be causing
this?

Thanks in advance for any help provided.