They're most likely Event Trace Logs, you can delete the whole whack of
them. If they keep on reappearing then you will have to turn off Trace
Logs. This might help:
HOW TO: Create and Configure Performance Monitor Trace Logs in Windows 2000
Creating Performance Alerts in Windows 2000
> I discovered a 'PerfLogs' folder on my boot drive - filled with over 20 megs
> of 1,040 KB .etl files.
> I Googled their function & got a ton of search hits that explained nothing
> that made much sense and many that simply suggested that I compress the
> Do I need the folder or the files? What's their purpose? How long has my
> system been accumulating this data? Who accesses it? I think you get the
> idea. Please advise & suggest how we can better monitor our systems to
> prevent such seemingly useless baggage from accumulating.
> Thanks - Blithe