I found a great free backup utility from Microsoft (XP, 7) that I use all the time. It synchronizes two folders, I have a networked drive and synch folders from 3 computers to it. No need for any complicated expensive software. It is called SyncToy (but it is no toy) and you can even schedule it with the windows scheduler.

http://www.microsoft.com/downloads/d...displaylang=en

~John