Explorer.exe error

i Suggest you try to check your start up by entering regedit (registry editor), try to find aplication or file that should not be appears in your start up program.
to check your start up program, you can go directly to "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" after enter "regedit"

if you find any anonymous start up program, just delete it from your registry
e.g : mail.exe, disket.exe, ddm.exe etc

Thanx

As said in the previous post, this can be because of various applications. Please provide the exact error [any files specified in the error].

Also, follow the troubleshooter listed at,

http://support.microsoft.com/?kbid=281770

This helps.