Re: Perpetual re:booting
From: Larry Samuels (larry_at_mvps.org)
Date: 08/29/04
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Date: Sun, 29 Aug 2004 18:23:32 -0400
It sounds like the Prescott CPU problem caused by systembuilders installing
Prescott processors on boards which do not fully support them. As a result,
the processor microcode is not updating correctly.
The quick test is to boot into a safe build and rename
%windir%\system32\drivers\update.sys so that it does not load. This should
allow the machine to boot up with whatever microcode update the BIOS has
supplied. Then if a kernel debugger is attached a !cpuinfo or a !cpuid and
a "rdmsr 8b" will tell you the processor family/model/stepping and microcode
update id.
If you don't have a kernel debugger attached, the Intel Processor Frequency
ID Utility will provide this information:
http://support.intel.com/support/processors/tools/frequencyid/
The microcode version is identified by this utility as "CPU Revision"
So for this CPU:
. CPU Family = 15
. CPU Model = 3
. CPU Stepping = 4
The microcode revision should be at least 8 (if it is zero, then no
microcode update was installed at all):
. CPU Revision = 8
Renaming update.sys is NOT a fix--it will simply allow you to identify the
problem, boot the pc, and remove SP2 until you can obtain a bios update from
the motherboard manufacturer to properly support the Prescott processor.
-- Larry Samuels MS-MVP (Windows-Shell/User) Associate Expert Expert Zone - www.microsoft.com/windowsxp/expertzone Unofficial FAQ for Windows Server 2003 at http://pelos.us/SERVER.htm "Bill Fraser" <willandcarol@av.eastlink.ca> wrote in message news:%23u8B2cGjEHA.2556@TK2MSFTNGP10.phx.gbl... > Dennis: > I have exactly the same problem. See my post "XP won't run with SP2" > about > 16 entries or so above yours. Microsoft MVP thinks it's a hardware > problem, > so I have sent my sustem specs in hopes he can sort it out. > Let me know if you find an answer, and I'll do the same. > Bill Fraser. > "Dennis" <anonymous@discussions.microsoft.com> wrote in message > news:177401c48c4d$8ce5b010$a301280a@phx.gbl... >> after downloading S2 I cannot login itno Widows. I get >> the logo Windows XP Professional, but then it goes black >> longer than usual and no login, instead reboots again and >> again.... suggestion > >
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