How to Reinstall Windows XP Without Formatting Your Hard Drive ?

Some times XP become corrupt or other reason of mistakes XP become unusual.
so what is a solution,you should format your system drive that is where you install XP.
But we loss all of your datas and software installed in that system drive....
So there is a way to reinstall Windows XP without formatting your entire hard drive....
Now see how is it..

While simply installing OVER an old installation may help, folders such as \Windows and \Program Files will become cluttered. This guide explains how to simply delete these folders.

• Get an XP CD, preferably the one you wish to reinstall.
• Reboot and configure your computer to boot from the CD, then enter Windows Setup.
• When all the drivers (including any you might need to specify yourself) have loaded, you should be at the main Windows Setup screen. Note that if you are using a Trial Copy CD, there will be a screen explaining that the copy is a trial, BEFORE the main Setup screen.
• Press "R" to start the Windows Recovery Console.
• Select the partition and Windows installation you wish to modify.
• The Recovery Console will then prompt you for your Administrator password. If you don't have one, or don't know what it is, see the related wikiHows.
• You should now be at a command line. Just like in DOS or the Command Line in Windows, you can use commands to modify, delete, move, etc. files and folders.

If you wish to completely start from scratch, delete the following (with Windows XP). To delete, type -del "path"-, without the dashes.

• \WINDOWS
• \Program Files
• \Documents and Settings\username\Application Data
• \Documents and Settings\username\Local Settings
• \Documents and Settings\username\NTUSER.DAT
• \Documents and Settings\username\ntuser.ini
• \Documents and Settings\username\ntuser.dat.LOG

When this is done, reboot the computer and install a fresh copy of Windows!
You can do much more with the Recovery Console than described here, so look into it. Using the Recovery Console in some situations might be a better alternative to reinstalling Windows completely.

Note:Do not delete anything other than what is told, or anything in the root drive.