Can't delete file

I have a file on my XP Pro SP1 system that I can't delete. Everytime I try I get an error message that says

Cannot delete (file): It is being used by another person or program.
Close any programs that might be using the file and try agian.

Problem is there are no users/apps using the file. I've gone in safe mode as administrator and I still get this crap. The file in question is a huge uncompressed AVI, just over 3 gigs in size. I'm long finished with it, and I was "cleaning up house" when all this crap went down.

If it may mean anything, the file is stored on a 2-drive NTFS RAID 0 array controlled by a 3Ware 7410 controller. I've never had a problem with this setup, and I doubt it had anything to do with this, but I'll mention it anyway.

I also recently installed SuSE Linux on a separate drive (system drives are on pull-out bays, and SuSE recognized the 3Ware controller, much to my amazement. It lists it as C drive), and I actually tried to dump it through Linux, to no avail.

So, any clues as to how I can dump this file will be greatly appreciated, thanks.