You could try System Restore. If using XP see below:
To use the System Restore Wizard, make
sure you're logged on as an administrator, and then follow these steps:
1.
Click
Start, point to
All Programs, point to
Accessories, point to
System Tools, and then click
System Restore.
2.
On the Welcome screen, click
Restore my computer to an earlier time, and then click
Next.
3.
On the
Select a Restore Point page, select the date from the calendar that shows the point you'd like to restore to, as shown in Figure 2, and then click
Next.
Figure 2
4.
On the
Confirm Restore Point Selection page, verify that the correct restore point is chosen, and then close any open programs.
5.
Click
Next if you are ready to proceed or click Back to change the restore point.
6.
The computer will shut down automatically and reboot. On reboot, you'll see the
Restoration Complete page, and then click
OK.
After
reviewing the stability of your system, you can choose another restore
point or undo this restoration. Just open System Restore and make the
appropriate choice. After you use System Restore, you'll have an
additional task,
Undo my last restoration, on the System Restore
Welcome page. Remember that you'll have to reinstall any programs that
were installed after the restore point.
If System Restore doesn't
work in Normal Mode, it might work in Safe Mode. To use System Restore
in Safe Mode, press the F8 key during reboot and choose Safe Mode. When
your computer starts in either Safe Mode or Normal Mode, System Restore
can be used to capture a working previous state. System Restore can't be
opened unless the system is bootable into one of these modes.
The above info was "lifted" from
http://www.microsoft.com/windowsxp/using/helpandsupport/getstarted/ballew_03may19.mspxHope that works for you
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