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Tim LiebenTim Lieben 

avgVmm.sys blue screen of death

Hi,

I currently get a error (blue screen) when booting my computer.

It says my pc needs to be repaired.

The operating system couldn't be loaded because a critical system driver is missing or contains errors.

File: \windows\system32\drivers\avgVmm.sys
error code: 0xc000007b

Booting to safe mode gets me the same error.

Can you help me solve this issue?
AvinashAvinash (Avast) 
Hi Tim.
We regret the inconvenience caused.
Are you using AVG AntiVirus free? I'd request you to uninstall AVG and reinstall it to resolve the issue.
Tim LiebenTim Lieben
Hi Avinash,

Thank you for your response.

The problem is I can not boot into windows. Booting causes the error, wich causes a reboot wich causes the error ... . So an infinite bootloop :(

I can not try your solution.
Do you know another way?

Thanks,
Tim
AvinashAvinash (Avast) 
Tim, I'd request you to boot your PC in safe mode and try to uninstall AVG AntiVirus free.
Jimmy plJimmy pl

For all those who stumble upon this in the future there is a fix to this problem but i will say it is a little involved.

It requires that you remove the problematic drive from the computer and plug it into a working windows computer. Opening RegEdit on the good computer, opening the 'system' hive of the problematic drive and finding the avgVmm.sys, and setting the start number to 4 (which means disabled).

I have left out details on how to achieve the steps above (as its easier to say than to type) I have made a short video under the title "How-to: avgVmm.sys BSOD "corrupt or missing system driver"."

or you can use this link My Tutorial youTube video (https://www.youtube.com/watch?v=UgslNQJnQTg&feature=youtu.be)
Shawn EnglemanShawn Engleman (Avast)
Hello Tim (and Jimmy too). Thank you very much for taking the time to write and communicate. My name is Shawn and I am writing on behalf of the AVG Senior Support team.

First and foremost, thank you Jimmy, for your shared troubleshoot solution.

Tim, specific to your concern, given you referenced you are not able to access Safe Mode, you should be able to run the Windows Recovery Environment, and restore your operating system.

To access Windows Recovery, when initially booting your system, press and hold the F8 key, and select the "Repair Your Computer" option from the boot menu that appears. The following Microsoft support article, https://support.microsoft.com/en-us/help/12415, provides detailed instruction (specifically, "Reset your PC" > "Reset your PC from the sign-in screen" section").
Shawn EnglemanShawn Engleman (Avast)
If this does not work, you may try Jimmy's suggestion. Alternatively, it may be necessary to perform a backup of your hard drive and reinstall your operating system.

Regrettably, if this troubleshoot is beyond your capability, it may be necessary to consult a computer repair service provider.

Good luck. Let me know how this works out for you. Regards, Shawn
Tim LiebenTim Lieben
Hi,

The windows recovery mode didn't work either.

Dell recovery disk didn't work.

Finally I have found a reïnstall disk (usb) file on the website of windows.

In the end I had to completely reïnstall my laptop.

Positive note, all the bloathware is gpne :D
Shawn EnglemanShawn Engleman (Avast)
Hi Tim. Thank you for the update, and I am happy for you that this is a resolved matter.

All the Best, Shawn
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