Have you ever configured backup?
Open OneCare
Click Change Settings
backup tab
Click Configure Backup
Click change settings in the lower left
Make sure that the first screen for Centralized Backup has "No Centralized backup" selected if you see that choice
Click your PC on the left.
Select the change location link and select the drive you want to use for backup
Modify the schedule as desired for "When"
Select the file types as desired for "What"
Check the selection for "Turn on backup for this PC." if it is not checked
Click Next and save the revised plan.
-steve
Microsoft MVP Windows Live / Windows Live OneCare & Live Mesh Forum Moderator