Win XP Pro

[imported_IrvinJ]

In the past three days, since the New Year; I have noticed that my Help and Support | Undo changes to your computer with System Restore is not functioning correctly. I cannot go back to the previous month nor is the Utility making a System Check Point on a 24 hour basis. I can Create a Check Point, but within 30 minutes or less it disappears. Anyone experiencing anything like this since the first of the year? I'm stumped! Have searched several forms for clues, even MS Knowledge Base; all to no avail.