||[Sep. 30th, 2004|10:08 am]
WINDOWS XP WON'T BOOT AFTER INSTALLING SP2 - A BIOS UPDATE MAY BE NECESSARY|
Installing Microsoft Windows XP Service Pack 2 on a PC with a "Prescott" CPU and certain chip sets can cause it to fail to reboot completely. The problem can be solved with a workaround or a BIOS update.
Depending on the chipset, motherboard manufacturer, BIOS version, and CPU, installing Microsoft Windows XP Service Pack 2 can result in an unbootable computer system. The problem is generally associated with Intel "Prescott" CPUs and its chipsets, but not every such combination will cause a problem. As of this writing, motherboards exhibiting the behavior include:
Technically speaking, the problem revolves around the machine's BIOS not installing a production level microcode update. To check whether the BIOS is at the correct level, download the Intel Processor Frequency ID utility. The microcode version is identified by this utility as CPU Revision, which should equal at least 8.
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Take care if you have to do anything with this.