I had a problem once with getting a flashing blue screen (reboot loop) when I installed sp2 on a customers eMachine.
I ended up just doing a fresh install after backing up her data on another computer.
You may want to try these steps though even though they did not work for me...
If you would like to diagnose the blue screen error, you need to boot into safe mode (if possible).
Hit F8 multiple times immediately after your computer flashes the bios screen on boot up. Select Safe Mode.
If the computer boots properly go to Control Panel > System then click the "Advanced" tab.
At the bottom you will see a section called "Startup and Recovery" click the "Settings" button for Startup and Recovery.
In the next window, uncheck the box labeled "Automatically restart"
Once you do this, the computer will no longer automatically restart, instead it will lock up when the blue screen error displays.
After you have the blue screen freeze, you can write down the information it provides and can offer more assistance with troubleshooting your error since you know the exact error code affiliated with your problem.
I hope safe mode works since this will offer a great deal of help troubleshooting your problem.
If safe mode is impossible you may want to perform a repair install of Windows.
Open the recovery console by booting to a Windows XP install cd, and press "r" after setup loads
This will load the recovery console, select the Windows installation you would like to configure (usually 1: C:\Windows)
Type the Administrator password if one exists.
At the prompt type "Chkdsk /r" with no quotes.
When it is finished type "exit" with no quotes, remove the XP install cd, and see if the computer boots.
If that does not work, there is a way to remove sp2 using the recovery console.
Check this Microsoft article for exact instructions.http://support.microsoft.com/KB/875350
I remember in my research on the problem it was related to a certain Intel processor (celeron I think, I do not remember it was about a year ago)
If you have an Intel celeron, it is probably due to the same problem, hopefully uninstalling sp2 will fix the problem.After I performed a restore, the FIRST thing I did was update windows and install sp2, I ran into no problems.
BUT, if you re-install XP sp1, apply this patch before to address the issue: http://www.microsoft.com/downloads/details...07-b620727be8d8
You may also want to check this article for more information. This has many more tricks than I have provided you, but I have never done them myself so I cannot guarantee anything.http://winhlp.com/node/125#Boot_or_shutdow..._2_installation
Edited by lowtek_otc, 17 February 2008 - 02:14 AM.