Fixed pre-login BSOD, don't know the cause

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koberulz

Member
Rebooted my computer yesterday. Instead of loading the login screen, it loaded a BSOD, and got stuck in an infinite loop.

Could boot into safe mode fine, though. Ran through the Windows suggested solutions: no malware, Windows Update wouldn't run in safe mode, system restore didn't work, I hadn't recently installed any new hardware/software/drivers. Ran a Check Disk on the C: drive, checked both boxes, it told me I had to schedule it for next boot as the disk was in use. Rebooted. Ended up booting into safe mode, probably after yet another BSOD. It got stuck at the screen where it loads all the drivers and whatnot, with "please wait..." at the bottom, so I left it thinking it might be running the Check Disk and watched TV. Went back periodically, no change, until eventually going in to find it had booted normally and was sitting at the login screen. I shut down without logging in, as my first thought was just to leave it alone (Google results indicated hard drive failure as a likely cause). Then I decided to back up what I needed from the C: drive (settings, etc; most of my data is on a different drive), so I booted up. There was no message from Check Disk about what it had found, which may or may not be a result of shutting down after it'd finished.

Since the BSOD is no longer an issue, I have no idea if this is in the right section or how relevant any of the BSOD posting protocol applies.

However, I still don't really know the cause. Any suggestions?

Windows Vista Home Premium SP2 64-bit.
 

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We should be able to get you up and running, but first back up your stuff
Use Ubuntu Live CD to Backup Files from Your Dead Windows Computer
If you cannot load Ubuntu, you have a hardware problem. If you can load it is software and easier to fix.
Since you mentioned that your stuff has been backed up and you have all of it, we can use Ubuntu to determine a hardware v software problem.
 
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It might help to know what the blue screen said as well as the last driver listed when it hung in safe mode. Check disk can take a long time to finish especially if you have a large slow hard drive. Perhaps that is what was going on.
 

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richc46 said:
If you cannot load Ubuntu, you have a hardware problem. If you can load it is software and easier to fix.
Click to expand...
I can currently load Windows. Surely being able to load Ubuntu wouldn't be any different? I'm not currently suffering a BSOD, it's gone. All I'm trying to do now is prevent it recurring.


townsbg said:
It might help to know what the blue screen said as well as the last driver listed when it hung in safe mode. Check disk can take a long time to finish especially if you have a large slow hard drive. Perhaps that is what was going on.
Click to expand...
It started with "avg". I don't recall the rest of it.

2013-12-24 15.50.51.jpg
 

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System One

It's happening again. Rebooting results in nothing more than an infinite loop of BSOD, unless I boot into safe mode.

When loading safe mode, the last driver loaded starts with "avg", which may be the driver mentioned above, and it pauses there for a bit, which I assume is normal because it's happened every time I've booted into safe mode, not just when this problem happened. It's a few seconds, rather than a few hours, though.



EDIT: Could it be heat-related? It's been absurdly hot both times this has happened (it's currently 39C/102F), although I would've thought that would also preclude booting into safe mode. It took all day to troubleshoot last time, and it was around midnight or so when it started working again, so it could have just had time to cool, rather than being anything to do with the disk check.
 

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This is the driver causing the problems
[h=3]VMHybr64.sys[/h]VMHybr64.sys file has been corrupted or deleted on the computer mistakenly
Related registry files has been damaged or corrupted
Windows or drivers have been out of date
Improper program installation or removal
Malicious spyware or virus invasion

The above are the most likely reasons for the problem

To solve the problem the following
Use system restore and go back one month. Test to see if you still have problem
Then
Try updating all drivers
Remove any new programs installed in the last month
Run your anti virus, download and run a full scan with malwarebytes
Try each step and then test. If problem still persists try the next step
 

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Keyboard
    Dell USB
    Mouse
    Dell USB 4 button optical
    Other Info
    DSL provided by ATT
Go to search by the start button
Type device manager
When device manager comes up look for small yellow arrows (inverted pyramids), these drivers are corrupt, update them
You update by clicking on the arrow next to the name, then on the names that appear, right click and then update.
If there are no problem drivers, try updating them all.
 

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Keyboard
    Dell USB
    Mouse
    Dell USB 4 button optical
    Other Info
    DSL provided by ATT
I've run it several times. It keeps finding errors and saying the fix will take effect on the next reboot.

I'd initially been leaving it during the reboot, and it turns out it was rebooting, BSODing, then booting normally. Sat with the reboot the last two times, manually booting into Safe Mode to avoid the BSOD, but it still can't seem to actually fix the errors.
 

My Computer

System One

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Keyboard
    Dell USB
    Mouse
    Dell USB 4 button optical
    Other Info
    DSL provided by ATT
One last thought, the driver is from compro technology. If you have software from that company, you can try to uninstall.
 
Last edited:

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Keyboard
    Dell USB
    Mouse
    Dell USB 4 button optical
    Other Info
    DSL provided by ATT
Uninstalled my TV card, BSOD went away. SFC kept finding errors, though.

Reinstalled the TV card, rebooted, ran SFC, still found errors, rebooted...BSOD.

I've got SP2, but my disc is SP1, so a repair install apparently isn't an option.
 

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System One

OK we found the driver causing the BSOD, you have to contact the manufacturer of the software and discuss it with them. All that we can do is find the cause. One solution is to remove the software, the other is try to make adjustments to the software to avoid the problem. For that you need to speak to the software manufacturer.
For the SFC errors, if it does not fix them automatically, a repair install is suggested..
 

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Keyboard
    Dell USB
    Mouse
    Dell USB 4 button optical
    Other Info
    DSL provided by ATT
That software has worked absolutely fine for five years. Something must have happened recently to cause it to kill my computer. I've never run the SFC before, so who knows how long that's been playing up.

How can I do a repair install of Vista SP2 with a Vista SP1 disc?
 

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System One

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