I found this error in the Application section of the Event Viewer.

I would like help in finding out what is causing it.

Application Failure explorer.exe 6.0.2 900.2180 in shell32.dll
6.0.2900.2180 at offset 00023c3e 0d 0a
Posted on 2011-01-13 08:30:15 by skywalker
the 0d 0a at the end is a clue... i am guessing that explorer is trying to call ShellExecute on a filepath thats been set to "13,10" - ie, CRLF

Posted on 2011-01-13 09:46:10 by Homer

I found this, and as a result I un-installed FaJo XP File Security Extension
to see if the error message stops appearing.

<Typical this problem is caused by non Microsoft Explorer Shell Extensions and you can troubleshoot you can use AutoRuns <for Windows to troubleshoot.  You can disable all of the Non-Microsoft shell extensions  and test to see if the problem <occurs and then re-enable them 1 by 1 to see which one causes the problem.
Posted on 2011-01-13 23:26:37 by skywalker