How do you re-enstall windows?

i have windows xp pro

How do you re-enstall windows?microsoft exchange

there shoudl be a disk that came with your computer you just stick that in your computer and reboot and go through the prompts

How do you re-enstall windows?windows vista ultimate internet explorer

did you lose the manual because i am sure it says somewhere..
Try here for a great easy to use tutorial.

http://www.bootdisk.com
If it's provided as a restore software CD by manufacturers;if not if you have purchased from Microsoft Box version-go to control panel and click add remove program and click window xp - click remove.
if you have the installation program just reinstall it but i recommend that you not reinstall it because serious problems might occur but i advise you to consult with a technician.
I found Lifehacker's tutorial on how to reinstall Windows XP to be the most comprehensive and comprehensible. You can find the article at:

"Geek to Live: How to format your hard drive and install Windows XP from scratch" -- written by Gina Trapani (http://www.lifehacker.com/software/top/g...

Hey, Windows XP users: The blue screen of death got you down? Missing dll errors making you frown? Frequent software crashes leave you yearning for that fresh, new PC you unpacked with glee three years ago? If you've scrubbed for spyware and viruses, defragged, chkdsked and done the requisite rain dance but things are STILL wonky on your computer, it may be time for extreme action.

Today we're going to go over how to format your hard drive and reinstall Windows XP from scratch to get back that shiny new operating system feeling untainted by years of wear, tear and added and removed programs.

Note for the tremulous: I cannot tell a lie; reinstalling an operating system is NOT a trivial task. There are several junctures where lots of things can go wrong that can affect the way your PC functions FOREVER. Further, this isn't a task one can complete in just a few hours. There are lots of ways to fix PC problems before reinstalling Windows, a fresh install should be an absolute last resort. It took me three years - one which involved installing and uninstalling programs almost daily - to get to the point of reinstalling Windows. You have been warned.

Still with me? Good.

What you'll need:

1. A Windows XP machine in dire need of a fresh start

(Without any crucial, un-backedup data on it)

2. A Windows XP installation CD with a valid Product Key

(Preferably the disc that shipped with the computer originally, in which case the Product Key won't be obviously listed)

3. The CDs and serial numbers of all the software you need to install on your fresh "new" machine

4. Hardware driver discs that shipped with the PC and any components you added on

(Optional, but VERY strongly recommended)

5. Another 'net-connected computer of any OS persuasion with a CD burner, thumb drive, or other removable disk

(Optional, but strongly recommended, for looking up stuff and downloading drivers in case of emergency)

6. One full day to get your PC fully functioning again.

Got all that? Good.

Let's get started. ...[more].
These people are full of it. If you have the original CD, just pop it in and reinstall. It will keep all your old settings and programs. If you're using a borrowed CD, just make sure it's the same version and service pack you have and use your original key code that should be on your computer somewhere.