Cannot boot XP as it hangs at Mup.sys - PLEASE HELP

[miteshlad2003]

All,

I really really need some URGENT Help here..

My Windows XP Professional Pc has been working fine for over a year and now suddenly it

won't start!!!!.

I have tried going into safe mode and it hangs at Mup.Sys. It doesn't go any further and

reboots. When i try to go use the last good known menu option it starts to loads and then

suddenly reboots itself.

I have made no changes to the hardware.

***** Things i have already tried:

tried the recovery console and disabled the mup service using the disable command.

tried disabling the serivce before that viaagp.sys ...still no luck

removed all my pci cards from the pc except my graphics card.....still no luck

disabled the usb options from my bios

i don't have a usb mouse

I have replaced the mup.sys file with the original file from the installation cd...still no

luck...

I cannot get the windows gui started at all...

I am now totally out of ideas and really need to get my pc working again....

PLEASE HELP ME!!!!

Thanks for your time

Mitesh

 

[bcastner]

Mup.sys just happens to be the last thing on the display when your machine locks, it is very unlikely it itself is the issue. Arbitrarily stopping services is generally not a good idea.

In almost all cases this is a hardware error, either RAM or a device on the PCI buss that is crashing the machine during device enumeration.

1. Start Recovery Console
chkdsk /r

2. If no joy, do a RAM test for an extented period:

http://public.planetmirror.com/pub/memtest86/

http://www.simmtester.com/PAGE/products/doc/docinfo.asp

3. Review/check all your BIOS settings. You may have inadvertantly enabled/disabled an onboard device, or some other parameter may be incorrect such as clock speed.

4. Several discussions of this issue here:
thread779-661574
thread779-497909
thread779-530295
thread779-576402

 

[miteshlad2003]

i have checked the RAM and it is fine......

i am thinking about doing a repair ontop of XP...but will i lose all my software thats installed....I have 5 users on there will they lose all there setting and what about outlook???...would all the data be lost too...

Would the repair blow away my old registry??? Should i back it up first??

Thanks

Mitesh

 

[SYAR2003]

It doesn't hang SAFE mode takes longer to load .
I experienced this myself in the weekend.
I thought pc was hung ,latest info on the screen was indeed MUP.SYS .
Later i descided to wait a bit longer ,and there it was
safe mode .(took some minutes ,don't be impatient)

 

[bcastner]

A repair reinstallation will lose only your XP Service Pack and Hotfixes, but not installed applications or user data.

http://support.microsoft.com:80/support/kb/articles/q315/3/41.asp&NoWebContent=1

 

[Xemus]

Repair install will make you create a new profile for your accounts tho. Data will still be there, but you'll have to copy it over. Sounds like a hardware issue to me tho, so this might not be needed.

MCSE, A+

 

[bcastner]

Repair install will not create new accounts.

 

[miteshlad2003]

Thanks All for your help...

In the end i perfomed an in place repair...although i never recieved the repair option, my windows folder was blown away....Nevertheless its all back up again and working...

A big thanks to you all

 

[Kalemenos]

I reformatted my disks, re-installed Windows XP, and I have the same mup.sys hang-on-boot problem. If I leave it on Safe Mode, yes it will boot up but only about 50% of the time, and only if I let it try to boot for HOURS overnight and wake up the next morning to continue work. Too many people on the net talk about this problem, and no one seems to understand the cause, nor how to diagnose the cause, a sign that MS put together a mediochre at best . If it is a hardware problem, that's not my field: how can I begin to diagnose?
Kale

 

[SYAR2003]

I have an idea that it's not the mup.sys that hangs as it's the last line put on the screen in safe mode before the GUI starts.
It's what happends next that hangs .
My guess it's some hardware abstraction layer issue
with ACPI/APIC mode and PnP os .

It's worth a shot to :

BIOS alternative one:
Enable APIC mode
Enable ACPI
Plug 6 Play os = No

BIOS alternative two:
Disable APIC mode
Enable ACPI
Plug 6 Play os = YES

Install windows .
Note !
Theese bios settings should not be altered
in a running system .Set them before installing windows.

SYAR

 

[gpalmer711]

miteshlad2003, Do you install the Windows Updates reciently? If so Microsoft have released a update for the VIA Chipset AGP Port, this is the file you are discussing in your first post. With this driver update installed I also am unable to boot into windows.

It's obviously a mute point now as you have reinstalled but for anyone else out there with a similar problem it is worth a look.

Greg Palmer

----------------------------------------
Any feed back is appreciated.

 

[miteshlad2003]

Greg,

I strongly believe the cause of the problem is the VIA chipset drivers...I performed a windows update and then my pc hanged.....

The best thing you can do is perform an in place repair of XP. This way you won't really loose much stuff.....except your personal setting and user accounts

If you have FAT Filesystem then try and boot with a Windows 95 / 98 CD and copy all the files you need onto another area of your disk....such as outlook pst etc etc and then when you perform the repait you can go to the way it was again.

Hope this helps

Mitesh

 

[gpalmer711]

miteshlad2003, Sorry I should have said that I just used last good config to use the old drivers and have reported the problem to MS and VIA.

Greg Palmer

----------------------------------------
Any feed back is appreciated.

 

[miteshlad2003]

yes its definately a problem with the new drivers.

Mitesh

 

[Kalemenos]

I found one ram card with dust caked on it at one point from the microprocessor's cooling fan. I cleaned it up and the prob. went away. I guess something on the ram board was short circuiting. Therefore it WAS a hardware problem.

 

[Superbaker]

This fixes that problem for me everytime.

http://www.digitalwebcast.com/2002/03_mar/tutorials/cw_boot_toot.htm

 

[nss11]

I had the same problem - Booting XP hung during loading of mup.sys. As far as I was aware, I hadn't installed/changed anything. After much teeth gnashing and frustration, I discovered that a setting in the BIOS was to blame. In the AMIBIOS setup, under 'Bios Features Setup', make sure 'Interrupt mode' is set to 'APIC'. Mine wasn't!

 

[Lueen]

I am having the same issues. Both my home computers are identical ( amd athalon 2800+, 512mb ddr ram, dfi infinity 2 MB, WD80) here is the catch, XP will install and run on one of the systems and not on the other. Bios settings are exact on each and all parts can be moved to th eworking system, MB included, and it still runs. So why not on the other?

 

[Jlouw]

Still on this damn mup.sys error!!!!

I run an internet cafe, we are using Norton Ghost 2004 to copy winxp so we have a fresh running system in case a user corrupts any of the machines. The ghost worked on pretty much all of the machines except for a few particular machines. these machines are of different spec to the others which had no problem. In saying this, i think it is definately a hardware problem. I have tried everything i read the forums and tips from other websites etc... and am still fighting with it.

Anyway, the point of the matter is, im pretty damn confident that its not a software problem, if anything, its a hardware issue! Im in the process of reinstalling windows over the existing windows installed on it from the ghost to see if i can sort it that way and then try the ghost again.

The other reason i say its hardware, is cause the ghost copy i ran on the machine in another pc worked perfectly. Im still open to other suggestions.