How do I reformat my Dell Inspiron 1521 to its factory settings?

I have a Dell Inspiron 1521 laptop that I am selling and I would like to reformat it to its factory settings before I ship it. It did not come with a disk to reformat it though. I would like to clean the hard-drive before I mail it. If anyone knows how to do this please let me know. Thanks...How do I reformat my Dell Inspiron 1521 to its factory settings?During boot up at the dell screen start tapping F8 should stop at a menu. look for utility partition or diagnostic partition on the list highlight it press enter from there you should get several options one should be dell factory restore press that and it will format everything and make it just how it was when it was shipped to you. Keep in mind if you have replaced the HDD or reinstalled windows in the past the utility partition may be gone.How do I reformat my Dell Inspiron 1521 to its factory settings?A word of advice, just formatting the hard drive will not prevent the next owner from gaining access to your files. There are programs that can recover almost all of the data that was there before the format. To be completely safe you need to destroy your hard drive.

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