Restoring Dell Factory Image From Vista DVD (Recovery)

Boot the computer using win Vista DVD and then Try the Steps Mentioned BELOW
1). Click Command Prompt from the System Recovery Options window.
2). In the Administrator window, type the following lines, pressing after each line.
path d:\windows;d:\windows\system32
d:
CD Tools
PCRestore
3). In the Dell Factory Image Restore window, click Next.
4) In the Confirm Data Deletion window, click to select Yes, reformat hard drive and restore system software to factory condition, and then click Next. The message Factory image successfully restored! appears when the process is complete.
5). Click Finish to restart the system.

For Detailed Info click on the link Below
http://tinyurl.com/38hu6f