Cannot enable Hyper-V - Failure to configure changes, reverting operation...

[Aura]

OS: Windows 8.1 Professional 64-bit fully updated (Update 3).

Cannot enable Hyper-V. On the first restart after the enable, it goes up to 100% then says that it cannot enable the feature and it's cancelling. On second restart, it says failure to configure the update and that it's reverting. Right now, I'm running DISM /RestoreHealth to see if I can find something in the log. My CBS.log is below.

https://www.dropbox.com/s/hwesd9r3z23pvmb/CBS_before_DISM.log?dl=0

All the interesting stuff is between 21:17 and 21:23. You can clearly see that I tried to enable Hyper-V but I cannot see what made it fail.

The DISM operation is complete, I'll restart my computer and then try to enable Hyper-V again to see if it worked. New CBS.log after the DISM.

https://www.dropbox.com/s/e16cm4nyjqaalo1/CBS_after_DISM.log?dl=0

I have no idea of what is causing this to be honest. My Kaspersky Internet Security 2015 could be involved but I have no proof of it right now. Also, if you see something that I missed, let me know and I'll look for it. It'll be a good experience to find by myself.

 

[Aura]

Even thought DISM said that the component corruption in the store was repaired, Hyper-V fails to enable. And I stand corrected, at 95% it throws me the error message, not 100%.

 

[BrianDrab]

Access Denied is never good.

... a ãhou® Code d'erreurx80070005.

Can you tell me how many entries you have in the following key?

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network{4d36e974-e325-11ce-bfc1-08002be10318}

 

[Aura]

I noticed that error code as well, I hoped that it wouldn't be the root of my issues. And there's 15 keys.

 

[BrianDrab]

This may work then. Increase the count of the maximum allowed system filter drivers. You can do this by changing the value of the following. Found here.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\MaxNumFilters

A picture of the MaxNumFilters value is here. If it doesn't exist, create it. Set the data to 16 maybe since you already have 15. Then reboot and give it a go.

Network Filter Drivers Issues in Windows 7

 

[Aura]

I've tried it already and it didn't work. I even set it to 0x14 like recommended on SuperUser.

 

[BrianDrab]

OK, it's helpful to know what you already tried. I know you don't want to uninstall Kaspersky but here's someone who did that to get it working. They had to do this along with changing the registry value.

https://social.technet.microsoft.co...hypervclient-editionpackage?forum=w8itprovirt

 

[Aura]

Alright. Working on it right now.

 

[Aura]

It worked, thank you a lot Brian :) I was aware that Kaspersky could be the issue, but according to this thread it should have been fixed in the 2015 version (or one of the update).

Cannot add hyper-v feature in Windows 8.1 with KAV 2015 - Kaspersky Lab Forum

Hence why I didn't try it first hand. Now to see if reinstalling Kaspersky Internet Security will cause issues... I'll create a Restore Point first just in case.

Anyhow, if you want, this thread can be moved to the general Windows Update section since it could come handy in the future.