Webuser Forums: Windows Explorer Error

I need to pick an expert brain or two.

For the past week whenever I exit Windows Explorer and arrive back at my desktop I get an error window pop up to tell me that Windows Explorer has encountered a problem and needs to close. Clicking on the close button W I does close momentarily and then continues as normal and this is sending me nuts.

Clicking on the link for Error signature produces the following
AppName: explorer exe
AppVer: 6.0.2900.3156
ModName: Unknown
ModVer: 0.0.0.0. offset:015c16d3

Clicking on the link for Tech Info produces a long list of info in the upper window and in the lower window it says

The following files will be included in this error report

and it lists
C:\\DOCUME~1\HP-ADM~1\LOCALS~1\Temp\1eb_appcompat.txt.

I am running XP Home.

I have run AVG Virus and Rootkit scans, Spyware Terminator and Spyware Doctor scans and ZoneAlarm has also done a scan of it's own accord and all came up with exactly nothing.

I seem to recall I did a defrag the day before using Auslogics program.

The only thing I have not tried is a system restore but I thought I would ask for advice before I did that.

Any info to help me get rid of this problem would be greatly welcomed