I have a Toshiba Qosmia G35-AV600 and I'm running XP Service Pack 3. I too keep having this problem, but I can't find a solution that really works. I have searched through Google many times and have tried almost everthing suggested by other users. One of the great answers I tried was to do the following:
Stop trying to remove this error with AdAware, AVG Antivirus, Spybot, HijackThis and so on.
THIS IS NOT A WORM, THIS IS NOT MALWARE, THIS IS NOT ADWARE, THIS IS NOT A VIRUS.
This is a Toshiba touchpad utility.
Navigate to C:\Windows\system32
DELETE 000StTHK.exe and 00THotkey.exe.manifest
Navigate to C:\Documents and Settings\All Users\Start Menu\Programs\Startup
PASTE 00THotkey.exe into the Startup directory.
This may work for some but it did not work for me. I have also upgraded my touchpad drivers directly from the Toshiba website, but to no avail.
Will someone please let me know a definitive fix that works??? I greatly appreciate all of your help.