[olug] Windows file access trace program?

[Neal R]

  I've got a new laptop and I'm going to leave it XP :-(  Its a Thinkpad
and there is some utility on the machine that accesses the disk every
sixty seconds or so - this is even more annoying than the helpful
paperclip in office. There are all sorts of ways to learn what processes
are doing on Linux but I have no idea where to start on Windows - is
there an lsof equivalent?