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I say this because now when XP boots, you hear the fans and hard drive spinning a full speed and when the XP load screen finishes, the computer gets quieter, but If you found this article on mup.sys resolutions useful (or not) and have comments, criticisms, or suggestions please feel free to drop us a note using our Contact form Thanks! The Mup service is using the mup.sys file that is located in the %WinDir%\System32\Drivers folder. All important files are backed-up, so I am free to experiment.

Thanks again. Even if you don't Im willing to be that is the problem that you are experiencing. If people experience power outtages or someone using their computer routinely powers off without shutting down, errors can become quite common on their drives. mup.sys is the last one it shows.

Now, XP (Home SP1) loads mup.sys and then reboots without a BSOD. David Good Oct 28, 2005, 12:19pm EDT Reply - Quote - Report Abuse Private Message - Add to Buddy List >>Re: Windows xp freezes at mup.sysHere is what I did with no errors or blue screens............... The problem was that even when you power down there is still power going to the hardware (at least on desktop machines) via the power supply.

Booting into Safemode yeilds the same results as trying to boot the standard OS. So now we need to reinstall the old registry files. Then, CHKDSK ran very, very slowly. Apparently, the MUP.sys is not the problem; it's the agp440.sys file which is (obviously) related to the video driver subsystem.

Dennis Dennis Hughes Nov 08, 2005, 03:47pm EST Reply - Quote - Report Abuse Private Message - Add to Buddy List >>Re: Windows xp freezes at mup.sysAs a follow up Herman 1 Just so you know the SPTD.sys is a third-party driver for the SCSI Pass-through Direct driver. Setting it (mup.sys) to +r seem to "lock" it and its been stable since. Any one of the preceeding actions can end up in the removal or data corruption of Windows system files.

Diagnosing hardware problems can be accomplished with one of the many hardware burn-in suites/tools you can find on the net. If it works, keep in mind that it may not be a cure-all. Mark Kevin Hubbard Nov 10, 2005, 11:45am EST Reply - Quote - Report Abuse Private Message - Add to Buddy List >>Re: Windows xp freezes at mup.sys I have the I had the same problem, and this is how I fixed it." This worked for me.

Hard drive activity does occur - quite a lot in fact - but the laptop can last for a few hours without doing anything (apparent anyway). KUDOS! Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the I know that my machine kicks off several background system services while idling at the user login screen (Remote Desktop, for instance); I don't know if that process actually begins before

Please note that all comments are welcome and appreciated. Anyway- check the link and maybe search the knowledge base for other agp440.sys problems/fixes... I never created an emergency boot CD (I know, I know) and I am out of things to try so any suggestions are appreciated. This is how this link will look: mup.sys resolutions mup.sys resolutions One other thing.

and here is an interesting link too: Apparently, some poor users experience this error a lot. Back to top #12 hamluis hamluis Moderator Moderator 51,227 posts OFFLINE Gender:Male Location:Killeen, TX Local time:10:41 PM Posted 08 March 2010 - 02:46 PM Try running chkdsk /r on the This is especially true if they have Write Back Caching Enabled on the Drive in Question (people can check that in the properties of the drive as listed in the Device The Fix complete. *File size: 8.5MB Download time: <120 Secs When you have System32driversmupsys error then we strongly recommend that you run an error message scan.

If booting normally it just stays on the winodws boot up screen for at least an hour and then reboots. Everything seems to work! Yet all I get is Mup.sys ???

Back to top #4 cryptodan cryptodan Bleepin Madman Members 21,868 posts OFFLINE Gender:Male Location:Catonsville, Md Local time:04:41 AM Posted 07 March 2010 - 01:21 PM Can you boot into Safe

Of course, the default is to leave them all on AUTO and let BIOS/Windows assign the IRQs. Back up anything you don't want to lose, just in case. share|improve this answer answered Nov 10 '09 at 16:33 Nathan Adams 1,9991319 add a comment| up vote 0 down vote Without a windows CD you might be out of luck. I took the Maxtor out and replaced it with the Western Digital, and proceeded to do a clean install of Windows XP Home.

Type exit to reboot the machine. Was there an association between the mup.sys issue and the power supply or not? Repair installation (but with an SP2 disk) - no solution. This took quite a while so be patient!

To learn more and to read the lawsuit, click here. It then starts these components possibly causing more draw on the power supply. Phew!!! Anyway, on to the problem: I tried to turn the computer on and it gave the C;\windows\system32\config\system is missign error.

ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection to failed. Typically, the System32driversmupsys error message may be brought on by Windows system file damage. I popped in the Windows XP install disk. B) for the hard drive from HP's website - William MUP.SYS - Software and data corruption Resolutions CHKDSK /P /R The synopsis was that the machine would get to the Windows