CCleanr foud it here:C:\Documents and Settings\User Name\Local Settings\Temp\ztf88z2.dll
But Cleaner can't delete it. I tried Unlocker, still can't delete it. It can be deleted under Safe Mode, but shows up every time I restart Windows. I also tried anti-virus softwares, they found nothing. I can't find any informations about "ztf88z2.dll" on the net. What's up??