Dell Inspiron 1521 (Mid 2007) - Manual (Page 137)

Troubleshooting
137
NOTICE:
Before you restore the computer to an earlier operating state, save and
close all open files and exit any open programs. Do not alter, open, or delete any
files or programs until the system restoration is complete.
1 Click Start → Control Panel→ System and Maintenance→ Back Up
and Restore Center.
2 In the Tasks list, click Repair Windows using System Restore.
3 Click Continue in the User Account Control (UAC) dialog box asking for
permission to run the application.
4 Click Next in the System Restore window to view the most recent restore
points in chronological order.
5 Select the Show restore points older than 5 days checkbox to view the
complete list of restore points.
6 Select a restore point. Try to restore from the most recent restore point. If
this restore point fails to correct the problem, try the next oldest restore
point until the issue is resolved. Any software installed after the selected
restore point will need to be reinstalled.
7 Click Next→ Finish.
8 When prompted, click Yes.
9 After System Restore finishes collecting data, the computer restarts.
10 After the computer restarts, click OK.
To change the restore point, you can either repeat the steps using a different
restore point, or you can undo the restoration.
If you encounter any error messages during the restore process, follow the
prompts on the screen to correct the error.
Undoing the Last System Restore
NOTICE:
Before you undo the last system restore, save and close all open files and
exit any open programs. Do not alter, open, or delete any files or programs until the
system restoration is complete.
1 Click Start → Help and Support.
2 Type System Restore in the search field and press <Enter>.
3 Click Undo my last restoration, and then click Next.