I JUST TRIED WHAT YOU SAID AND A MESSAGE APPEARS SAYING IT IS ALREADY ACTIVATED, BUT IT KEEPS RESTARTING

You don't have to Register Windows XP with Microsoft but it must be Activated either by use of DELL reinstallation XP CD  which is pre-activated or if Microsoft XP CD used Activate with Microsoft.
To check or Activate use Start > Run & type
oobe/msoobe  /a

If you use Windows Repair the Data & Programs a left intact but the Windows Updates including SP1 have to be downloaded again.
Repair isn't a reinstallation but you need to start setup to get R epair option.
boot from XP CD.

Message Edited by gryjhnhpe on 11-02-2003 07:39 AM

I reinstalled Xp just only yesterday... there must be a way to fix it wothout repairing it.

 

 

You could try Windows Repair from XP CD (not the 1st R for Recovery Console , start setup by pressing Enter then select R for Repair.)

http://www.windowsreinstall.com/winxphome/installxpcdrepair/index.htm   refers

IT SAYS THE WINDOWS NT ADMINISTRATOR WILL NOW RESTART WINDOWS

That sounds like what happens if a new XP system becomes infected with the "Blaster" worm.

See  this article for advice.

Jim

http://securityresponse.symantec.com/avcenter/venc/data/w32.welchia.worm.html

I think you are infected with the welchia worm. Read the info in the link and then scroll down to the bottom to download the removal tool/fix. It will tell you if your computer has this infection.