To start the computer from the Windows XP CD-ROM, you must configure the
basic input/output system (BIOS) of the computer to start from your CD-ROM
drive.
Insert the Windows XP CD-ROM into the CD-ROM drive, and then restart the
computer.
After the BIOS startup sequence finishes and immediately prior to Windows XP
attempting to boot the following text will appear if the system is booting
from the Windows XP CD.
Press any key to boot from cd
Press any key (for example spacebar) at this time
When the "Welcome to Setup" screen appears, press R to start the Recovery
Console.
Select the installation of Windows XP that is currently not booting
When you are prompted, type the Administrator password. If the administrator
password is blank, just press ENTER.
At the command prompt type the following commands and press enter or the
return key
cd system32
cd drivers
ren update.sys update.ren
To exit the Recovery Console and restart the computer, type exit at the
command prompt, and then press ENTER.
This will allow the system to boot
Navigate to the control panel and remove SP2 using add/remove programs
The system vendor should be contacted as required using that vendor's
escalation procedure.
The system may need a newer BIOS that supplies at least the minimum
production level microcode update as shown in the table below.
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.
It is possible to check the processor details using a utility from Intel:
http://support.intel.com/support/processors/tools/frequencyid/
The field reported as "Revision" is the microcode update signature.
After installing a correct BIOS on the system, the system should function as
expected with Windows XP SP2.
This posting is provided "AS IS" with no warranties, and confers no rights.