Not much help here but there is a back up scheme for XP - sadly IT always set that up via a server somewhere on the network , how they did it I don't know but it is possible for auto back up .

Caveat .
I had about 3,000 emails , that documents the life of a construction project . Which is extremely important to save every conversation .

Then all of a sudden all 3,000 where deleted , right before my eyes . I called IT they went to the back up server and it was deleted too .