Undoing the Last System Restore
NOTE: 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 
.
2.In the Start Search box, type System Restore and press <Enter>.
3.Click Undo my last restoration and click Next.
Restoring Your Operating System
Dell Factory Image Restore
CAUTION: Using Dell Factory Image Restore permanently deletes all data on the hard drive and removes any programs or drivers installed after you received your computer. If possible, back up the data before using this option. Use Dell Factory Image Restore only if System Restore did not resolve your operating system problem.
NOTE: Dell Factory Image Restore may not be available in certain countries or on certain computers.
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