Windows 2000 stuck in endless loop

I am working on an HP omnibook laptop. It is a P3. No hardware had been changed. the system got an error and the customer rebooted.... now the computer is stuck in an endless boot loop. It goes through the splash screen and then gets a BSOD and reboots. It does the same in safe mode and in safe mode command prompt. I have tried booting to a win2k pro disk but the laptop is not recognizing the cd drive and booting to the disk. any ideas on how to get to the recovery console or anyplace in the os. I think my problem is a corrupt registry but I cant get to the hard drive to find out.



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hawgpigAsked:
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KaliKoderCommented:
Hello-

Did you try to install some sort of new software, or did you try to install a new device driver ? Have you tried the "Last Known Good" option on bootup yet ?

If you have and it did not work, then your soultion would be to do an "in-place" upgrade of Windows 2000
How to do an In-Place upgrade of Windows 2000:
http://www.jsiinc.com/SUBH/tip3900/rh3920.htm 
What does an In-Place upgrade change:
http://www.jsiinc.com/SUBJ/tip4500/rh4508.htm 

However, you say that it is not recognizing the CD drive and booting to the disk. Have you checked your BIOS yet ? Is your CD ROM getting detected in BIOS ? If it is, then is the BIOS set to boot from CD ROM first ? If it is, and you still cant boot from CD, then you would have to use the Windows boot floppies to boot. Check here on how to create them:
How to create Boot Floppies for Windows 2000:
http://support.microsoft.com/kb/197063/EN-US/ 

Once you have the boot floppies, try the In-Place upgrade like I mentioned above.

Thanks and Good Luck!
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TheDefiantCommented:
You don't necessarily need to go into the BIOS settings to boot from the CD.  This is the case for HP Pavilion and Compaq Presario notebooks: at the inital boot-up screen, which shows the HP logo, press ESC to choose which device to boot from.  Since this is a Microsoft operating system CD you'll be booting from, make sure you press any key when prompted to boot from the CD.  If you miss this prompt, the CD boot-loader will pass boot control over to the hard drive, which will bring you right back to the BSoD and a reboot...

It does sound like a corrupt registry file.  You might be able to see something confirming this on the second line of the BSoD error, just before the reboot.  Anyway, you can do a manual recovery of the Registry from the Recovery Console, once you get booted up from the OS CD.  The necessary steps are listed in this MS Support article (it is an XP article, but the steps should be the same, except maybe for C:\WINNT instead of C:\WINDOWS):
http://support.microsoft.com/kb/307545
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Zaheer IqbalTechnical Assurance & ImplementationCommented:
If all else fails try this...  http://65.24.134.81/KipSolutions/TroubleshootingXPBoot/LogonLoop.htm
Coutersy of Fatal_Exception..
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