This may have already have been posted, but I just ran across it. From:
Windows XP Service Pack 2
Problem Solver
Copyright © 2004-2005 Hans-Georg Michna
here:
http://www.michna.com/kb/WxSP2.htm#Cann ... ice_Pack_2
(This appears to be a useful page for a number of problems, BTW.)
Intel P4 Prescott, Celeron D, or Extreme Edition processor
Some affected motherboards
Abit IS7-V
Albatron PX865 PE Pro
Aopen AX4SG Max
Aopen EA65
Asus P4P800 Deluxe
Asus P4P800-E Deluxe
(requires BIOS version 1017)
Asus Terminator T2-P
Foxconn 865A01-G-6EKRS
Gigabyte GA-8PENXP
(requires BIOS version FF)
Jetway i875P
Shuttle SB61G2
Soyo P4I865P
Processors based on the Prescott design with a C-0 processor stepping are affected when the motherboard BIOS is out of date. The cause appears to be that the machine's BIOS does not install a production level microcode update (a correction to a fault in the microprocessor's own microcode).
A BIOS update is the best solution, but Microsoft has also released a fix, which can be downloaded from:
http://www.microsoft.com/downloads/deta ... 20727be8d8
Background: The update replaces the SP2 file update.sys, version 5.1.2600.2180, with a new version 5.1.2600.2508 that works correctly on the affected CPUs.
Try to boot into safe mode or disable both L1 and L2 caches in the BIOS to get the machine to boot, then uninstall Service Pack 2, then wait for and obtain an updated BIOS or install the fix. If you cannot get Windows XP to boot at all and cannot get an updated BIOS in time, you may have to do a repair installation of Windows XP.
Another workaround is known, thanks to my fellow MVP Cari at
http://www.coribright.com.
To check whether the BlOS is at the correct level download the Intel Processor Frequency ID utility from
http://support.intel.com/support/proces ... equencyid/. The microcode version is identified by this utility as "CPU Revision".
Family 15 (0xF), model 3, stepping 4 – must have a microcode update signature of at least 8. Latest microcode update signature is E.
Family 15 (0xF), model 3, stepping 3 – must have a microcode update signature of at least 7. Latest microcode update signature is B.
Family 15 (0xF), model 3, stepping 2 – must have a microcode update signature of at least 7. Latest microcode update signature is A.
If the revision number is lower than that or zero, boot into Safe Mode by pressing F8 after the BIOS boot sequence, then selecting Safe Mode from the menu.
Now follow the procedure described in the following Microsoft Knowledge Base article. It has been reported that this procedure may has to be performed after installing Service Pack 2, not before as indicated in at least one of the MS documents.
Your computer stops responding when you restart to complete the installation of Windows XP Service Pack 2
http://support.microsoft.com/?kbid=885626