We may earn a small commission from affiliate links and paid advertisements. Terms
If your computer came without an os disk and it is about a year old or so, chances are you have a recovery option built in. Dell PC Restore by Symantec.
If possible back up all data before you do this...
When you start and see the blue bar with dells website listed in it press <ctrl><f11> immediately. Then Click Restore. Then Click confirm.
its a Dell i bought in '04