Sökte lite på google, det finns mååånga med samma problem, att hitta en lösning var precis lika svårt då det verkar finnas många olika.
ett förslag
*I know exactly how mad and frustrated you are now. Be calm and try not to throw your PC out of the window.
This problem took me two days to figure out. My Windows XP got stuck during the startup. Booting in safe mode clearly showed that the computer stopped responding after loading Mup.sys.
I tried almost everything including numerous re-installs and even wiped out my RAID array, but still got no good news. Many helpful forums and sites suggested different problem sources: enabling APIC, NT File System, updating BIOS, etc. After countless hours of trial and error, I finally found the problem source: the USB 2.0 card. Taking the card out resolved my problem.
If you encountered a similar problem, try to take out your PCI cards one-by-one. You might be able to boot-up again. Good luck!
en annan
Then we found a posting by Sean Branham at the Annoyances.org web site. See the full text of the thread at http://www.annoyances.org/exec/forum/
winxp/t1047532372. Sean correctly determined that the cause of all these disparate "hung at Mup.sys" failures were actually caused by problem with the Extended System Configuration Data (ESCD) stored in the system BIOS.
The ESCD maintains a static list of Plug-and-Play resource allocations. This avoids recalculating all the allocations at each restart. If the ESCD gets corrupted, then the operating system cannot assign resources correctly. Windows makes this resource decision just after it loads the Mup.sys driver because that's when it loads the Advanced Configuration and Power Interface (ACPI) drivers.
You can download the (mercifully short) ESCD specification from http://download.microsoft.com/download/1/6/1/161ba512-40e2-4c...
Ett par trådar
http://pressf1.pcworld.co.nz/archive/index.php/t-45236.html
http://www.annoyances.org/exec/forum/winxp/t1047532372
Hoppas någon av dom hjälper.
Det verkar när jag läser, att det är usb som strular, disabla usb i bios och försök starta då.