How do i re-install widows xp?
my computer didn't come with any discs and i know that it is pre-installed but how do i do this.
Someone please help as this is driving me mad

What brand is your PC? Do you have a friend with a disk? (Original Windows disk - not a brand named installed disk) Use that other persons disk and the ID code information on your computer on the MS security tag. Or try when the computer boots read the screen and see if there is a splash command to repair the OS. Sometimes under the alt F4, shift F8 or Delete or some other key combination that is posted on the screen to get to these sub-menu areas.

Could also try just the F4 when the boot process is going on and do a Safe Mode Boot on the system. And then look into the program files to find the recovery or disk building process..

Or go to the Manufactures site and look for your pc there and a manual on it and there is often tips and tricks to learn on how to recover systems..

Good Luck!

bytlan is correct.

you need to go to the website of your manufacturer, there should be guides in there for the model of your laptop/desktop. Look for something that says about "recovery disc" or "reinstall"

computers that come with preinstalled with windows usually provide a software that can create your "recovery cd". recovery cd's contain the automated installer for windows and all the drivers. when you need to reformat your computer, backup all your files on a flash drive or external hard drive, then use the recovery cd to format your computer to the default factory settings.

if the manufacture website/manula does not say of a recovery disc, then your computer probably has a hidden partition on its hard drive. this hidden partition contains the automated windows and driver installers.

if you can give us the brand and model number of your computer, we can help you check the manufacturer website and instructions