XP Home Hangs on mup.sys

[Josh]

I have just diagnosed a problem with my computer that might be of
assistance to the general public.

I am running XP Home on a Toshiba Satellite and in the boot process it
kept freezing. When I ran XP home in safe mode, I noticed that it
seemed to stop on mup.sys then continued loading.

I tried disabling mup.sys (from the command prompt type mup.sys) but
that command was not recognized.

Finally I copied mup.sys (found in windows/system32/drivers) from a
good copy of XP and overwrote the copy on my computer.

It then booted normally.

Josh

 

[Josh]

I should add that every time I shut down the issue returns. However,
if I just overwrite the mup.sys file everything returns to normal.

By the way, the correct way to fix this I have seen is to disable
mup.sys from the MS recovery console, but I can't seem to find my XP
home disk anywhere.

Josh

 

[Alex Nichol]

I am running XP Home on a Toshiba Satellite and in the boot process it
kept freezing. When I ran XP home in safe mode, I noticed that it
seemed to stop on mup.sys then continued loading.

I tried disabling mup.sys (from the command prompt type mup.sys) but
that command was not recognized.

Finally I copied mup.sys (found in windows/system32/drivers) from a
good copy of XP and overwrote the copy on my computer.

You may have had a lucky coincidence. Mup.sys, the 'Multiple UNC
Provider' is the last file to get loaded, and there is normally a delay
after that while the system initialises. So a total hang at that point
*may* be associated by mup.sys, but is much more likely the
initialisation of a driver that is quite unrelated to it.

But glad it's working