Dell Inspiron 17R (N7110, Early 2011) - Manual (Page 68)

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Restoring Your Operating System
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 search box, type System Restore
and press .
3. Click Undo my last restoration and click
Next.
Dell DataSafe Local
Backup
CAUTION: Using Dell DataSafe Local
Backup to restore your operating system
permanently removes any programs
or drivers installed after you received
your computer. Create backup media of
applications you need to install on your
computer before using Dell DataSafe
Local Backup. Use Dell DataSafe Local
Backup only if System Restore did not
resolve your operating system problem.
CAUTION: Although Dell Datasafe
Local Backup is designed to preserve
the data files on your computer, it is
recommended that you backup your
data files before using Dell DataSafe
Local Backup.