If you live in the U.S. you can request a set of disks for your computer by using this form:  Dell Replacement Disks.  If you live outside the U.S. you will need to contact Dell Tech Support for your region and ask for the disks.  Use the U.S. form as a guide to the info you will need to provide to the Dell representative.
Hi  I need to restore a GX 260 back to factory setting, Big problem is that I have no discs - so I have been looking around for discs with no luck - I don;t seem to be able to find any for the model either on Dell wedhub that I can be downloaded. I am running Windows XP pro (It has a valid COA Label but tjhats all. Really pleased with the Machine - But just need to clear all the junk that the last person who had the Machine accumulated on it. Basically it needs a restore to Factory settings and re-install of Windows XP Pro (CD's Of which I have not got  - Just a COA Product Code). Can someone advice on how I can achieve this goal..   Best Regards Malcolm
Systems restore and recovery disc for Dell Optiplex GX260 SFF computer