System Restore is a component of Windows XP Professional that you can use to
restore your computer to a previous state, if a problem occurs, without
losing your personal data files (such as Microsoft Word documents, browsing
history, drawings, favorites, or e-mail). System Restore monitors changes to
the system and some application files, and it automatically creates easily
identified restore points. These restore points allow you to revert the
system to a previous time. They are created daily and at the time of
significant system events (such as when an application or driver is
installed). You can also create and name your own restore points at any time.
To access the System Restore Wizard, click Start, and then click Help and
Support. Click Performance and Maintenance, click Using System Restore to
undo changes, and then click Run the System Restore Wizard.