Actually, I don't think that's a Windows XP file. I believe its a file that is created by the program "ThumbsPlus". (If you are unaware of this program, here is the description from their website: ThumbsPlus is a highly customizable image database / graphics editor application that makes it easy to catalog and locate, as well as, maintain and modify all your graphics and multimedia files.) I have this program and it's very nice. In any event, as has been mentioned, it is safe to delete this file.