From: "Rich Gauszka" 

I'm not sure if this will help but some who have had the mup.sys hang were
able to continue by removing any attached usb devices and (if needed ) PCI
cards from the system. In some instances it appears that it's a power
supply problem

http://www.annoyances.org/exec/forum/winxp/1076996389

Ok, not sure if this will fix everybody's problem with system hang during boot, but
I was just able to get my system to boot ok, and I have been having this problem
for 4 months now.

I read a reply somewhere on here, in this mup.sys section, and the guy
started talking
about his power supply.

I have also noticed alot of poeple talking about USB 2 card added, and USB hardware.

So, I tried booting up will all my USB devices either unplugged or turned off.  I
have a USB Scanner, USB Printer, USB 6-1 card reader, USB Camera Connector, etc..

After turning off or unplugging them all, my XP Pro ADM system booted up just fine.
 So, I tend to agree with the guy that this may be a power problem for many
of us.
 I have a 300W powersupply, but I guess it's not enough to power all my USB
devices.

I didn't have this problem, untill after I added my USB Printer.

"Glenn Meadows"  wrote in message
news:41c1bf53{at}w3.nls.net...
> Yo guys.  Need some guru help here.
>
> Have one XP SP2 machine, Athalon 2100+ system, that after the last patches
> (and it did this once before), goes into a reboot loop.  Everything I've
> found, so far, has been fruitless to resolve this.  I can move the HD to a
> working system, and access the drive. I've done a commandline chkdsk /f/r
> on
> the drives 2 partitions.
>
> What I've done:
>
> Tried to boot into SAFE mode, hangs at the display of the driver mup.sys.
>
> Added /sos and /bootlog to the boot.ini file, as well as /basevideo  That
> gets me the same displayed list of driver names, then I get a plain style
> VGA screen that lists the boot OS version, etc., and then displays Boot
> logging enabled.  BUT, in the spot where the boot log is supposed to be,
> %systemroot%\ntblog.txt, there is only one dated back in August, not a
> replaced one from today and that boot.
>
> After that screen displays, the computer goes back to the bios start
> screen,
> and initiates a reboot again.
>
> How, when putting the HD into a working system, does one uninstall the
> fixes
> that were applied during the latest patch application?
>
> Where is the list and order of the drivers to load stored, so if the
> driver
> that's hanging/crashing is after the one displayed, you can see what it is
> to try to replace it, or rename it so you can attempt to bypass it?
>
> Also, I am unable to get this system to boot from the CDROM of Windows XP.
> The Boot from CD question appears for about 1 second, but immediately goes
> right past to the HD boot.  Even if I turn OFF the HD in the Bios, the
> computer STILL finds it, and tries to boot from it.
>
> The next thing I'm going to try, is to rename mup.sys to mup.sy_ and see
> what happens.  There is an older version of mup.sys in the service pack
> uninstall directory, that I could try, and probably will, to see if that's
> what's holding things up.
>
> --
> Glenn M.
>
>
>

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