Mup.sys

[Sheryl]

I just did an Auto Update of Win XP and now my computer
won't restart. It hangs up on mup.sys. How do I fix
this?

 

[Bern]

From an earlier post by Alex Nichol:

Mup.sys is a red herring - it just happens to be the last file that
normally gets loaded (as you see if you boot in SAfe Mode on a healthy
system) so all one can say is that something is going wrong in the
initialisation of the system once all files are loaded.

Best guess must be trouble with a driver. Boot to Safe mode after
hitting F8 as the BIOS info (or makers logo) goes to a black screen, to
get the Menu. If that is OK then a driver is almost certainly it. In
that case Start - Run - MSConfig.exe and on the Boot.ini page check
/BASEVIDEO and shutdown to restart. If that comes up in regular mode,
but with restricted video, then the trouble is in drivers for the video
card - check out the maker's site for new ones

 

[S.Sengupta]

Hi!Sheryl!
MUP.sys is Microsoft's Multiple Uniform Naming Convention Provider (MUP),
It controls network traffic.
Did you change a part of your computer hardware recently, like your
motherboard for instance? This would have caused this type of problem.
Regards/
ssg/pronetworks.org

 

[Sheryl]

My system won't boot to safe mode either. It stops at the
mup.sys and goes not further. So it's a little difficult
to do any troubleshooting. Isn't there a way to bypass
drivers individually?

 

[Sheryl]

I added a floppy drive but that is all we did. It booted
up fine the first time but the next time it came up with
a keyboard error. then when I restarted again, it
froze. I tried safe mode and found that it stopped at
mup.sys. It never goes any further.

 

[Malke]

I added a floppy drive but that is all we did. It booted
up fine the first time but the next time it came up with
a keyboard error. then when I restarted again, it
froze. I tried safe mode and found that it stopped at
mup.sys. It never goes any further.

This sounds like a hardware issue, possibly with the motherboard. Since
you just added a floppy drive, open the case and reseat everything. Be
sure you didn't put any cables in backwards (not easy to do with modern
drives, but floppies aren't necessarily keyed and neither are older
drives). Check around for loose connections.

Malke

 

[NobodyMan]

I added a floppy drive but that is all we did. It booted
up fine the first time but the next time it came up with
a keyboard error. then when I restarted again, it
froze. I tried safe mode and found that it stopped at
mup.sys. It never goes any further.

As explained before: it is NOT hanging at MUP.sys. It freezes after
MUP is loaded. This happens to me occasionally (maybe once every
couple of months), but my problem is apparently more easily fixed than
yours. I shut the system down, let it sit about thirty minutes, then
restart. System boots up like a charm.

This has got to be a hardware error. Unhook all your peripherals
(cards), make sure all your power cables/data cables are firm and
corretly hooked between MB and drives, then restart. Add your cards
back one a time to see if you can isolate the problem.