Creating a .DAT file every 5 minutes, filling up HD

Hi,

I found in the next directory “Windows\system32\systemuser\logs\pic” a lot of files (total of 5GB). It seems it is created every 5 minutes. The structure of the file is
“Year_month_day_hours_minutes_sec.DAT”

Anybody knows where it comes from and how to remove that?

OS: Windows 2003 (latest SP installed)

Thx