I have win xp pro. Every time before I reboot my system, I run ccleaner which clears out all my temp files, cookies, history, and cache. When I run ccleaner immediately after I reboot my system, it always shows 0 files that need to be removed. I noticed yesterday when I run ccleaner immediately after a reboot, there is a temp. system file that appears. I clicked the details of it and this is the exact file:
C:\windows\temp\perflib_perfdata_788.dat.

This file appears every time now after I reboot my system and run ccleaner. The only thing that changes in that file is the number (788) at the end of the file. It is a different number every time I run ccleaner after a reboot. Why is this file appearing? Could it be a virus on my system? I ran avast antivirus and it didn't pick this file up.