official word from microsoft/intel:
"Microsoft and Intel have been made aware that some systems appear to have an invalid configuration. This configuration may result in issues after Windows XP SP2 is installed.
If your machine is using Intel Prescott processors, the BIOS on the machine may have not supplied an appropriate (production – level) microcode update for your processor(s). You will need to get an updated BIOS for your machine that supplies at least the minimum production level microcode update as shown in the table below (contact your machine vendor if necessary). The machine should not have been shipped with less that these minimum (production level) microcode updates provided in the machine’s BIOS.
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.
Check your processor details using the utility from Intel:http://support.intel.com/support/pro...s/frequencyid/
The field reported as “Revision” is the microcode update signature.
After you install correct BIOS on your machine, the machine will then boot up and your install should proceed.
The best advice is to run the frequencyid utility from Intel before installing XP SP2. If your processor does not have a revision of at least the minimum shown in the table above, get a new BIOS for your machine and then run the frequency utility again.
An installation of Windows XP SP2 should not be attempted if you are affected by this and do not have the correct BIOS installed."
My BIOS needs updating since my Revision was 0...at least there's a temporary workaround tho.