Mup Sys Driver For Mac
- Mup.sys blue screen errors can be caused by a variety of hardware, firmware, driver, or software issues. These could be related to either Windows NT Workstation 4.0(Debug/Checked Build) software or Microsoft hardware, but it is not necessarily the case.
- Also, disabling the mup.sys driver by using the recovery console normally does not help either. Windows will then just hang at the driver that loads prior to mup.sys. If you are curious and want to know more about this driver check out the What is MUP.SYS and what does it do? Section below.
Thanks in advance for any help you can provide..and yes I did try turning it off and then turning it back on.
Running a laptop.Dell Latitude D520..the hard drive failed and was replaced with a similar one. Windows was installed with accompanying drivers and ran fine for several months. I am not aware of any changes to the system but it now will not boot all the way through.
If I run it normal the bars freeze on the Windows screen and running in safe mode it freezes at Mup.sys driver. I also tried repairing with XP reinstall CD and it will boot and run the CD but stalls at 'Setup is Starting WIndows' screen. I let it sit for several hours on the screen and it never changed.
If your Windows XP partition uses FAT32 as file system, you might be able to copy the mup.sys to XP from OSX. But for this you have to expand the file from the XP CD on another Windows PC as I don't think you can do the 'expand' in OSX.
I ran diagnostics and everything passed. I am not getting any error codes.
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If you have any suggestions of can help in any way I would appreciate it. Thanks.
Mup Service
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If you have a chkdsk scheduled to run on the next reboot (by responding in the affirmative to the question when choosing to run a chkdsk on the next reboot), or if XP finds that any volume on your system that has been marked 'dirty', chkdsk is going to run when you reboot.
If you boot in Safe Mode and chkdsk starts to run, the last thing you will see on the screen is mup.sys having been loaded.. then the chkdsk is going to run to completion. Your system will appear to be stuck.
If the system appears to be hung on mup.sys and the HDD light is flashing, it could be that chkdsk is doing what it is supposed to do or what you told it to do - checking the volume(s) for consistency. If that is the case and the HDD light is flashing, you need to wait it out and that could take many/several hours depending on the size of your HDD, how much stuff is on it and what chkdsk finds to do. Let it sit overnight if you have to, but be patient.
If that is NOT the case, then I suggest you power off, unplug everything except the keyboard and see if you can boot in Safe Mode with only a keyboard attached. If you have a PS/2 keyboard to use, I would use that instead of a USB keyboard. Sometimes a faulty USB device or driver can cause the system to appear to hang on mup.sys.
It is also important to realize that the problem is not with mup.sys (it has already loaded) - it is what comes after mup.sys that could be the problem (if it is not running chkdsk).
This is why it makes zero sense when people see this scenario and start trying to figure out how to replace mup.sys - that is not the problem since it has already loaded.
The next thing to load that sometimes causes problems is often keyboard and mouse drivers - especially USB keyboards and mouses (mice) devices, hence, you should unplug everything - especially USB devices. You only need a keyboard connected to press F8 to get to the Advanced Boot Options menu and choose Safe Mode and a PS/2 keyboard should be used if you can get your hands on one.