Hello,

I've been trying to install Hyper-V for a while, every time failing either with error 0x800F0906 or 0x800F081F. I tried pretty much all of the available fixes that didn't involve having to reinstall the entire OS which is a total hassle I'd rather avoid unless strictly necessary.

I changed the group policy to allow the installation from Windows Update, and forced change. I rebooted in the meantime several times too. I copied the sources/sxs folder from my Windows 8.1 ISO and provided it as an extra source. I even tried to use Win10 sxs folder from the ISO. Neither of these worked.

I tried using DISM from both shell and powershell (elevated). Neither worked. Installation just gets to 66% and claims it needs sources. ScanHealth and RestoreHealth do nothing, neither does sfc /scannow.

C:\Windows\logs\CBS because I saw many threads requesting that.

• Edited by Haxton Fale Tuesday, January 20, 2015 9:19 AM

Have you tried to install FrameWork 3.5 via Windows Features (Turn Windows features on of off)?

I prefer that you don't copy an extra source anywhere.

Set an extra source directly to the installation media.

Here is the guide.

http://support2.microsoft.com/kb/2785188/en-us

.NET Framework 3.5 has been installed before my attempts, I didn't try to install the additional parts (Windows Communication Foundation).

I tried getting the SxS source both from the installation media and after copying it to the local hard drive. Most guides suggest copying.

I tried pointing the group policy to the installation media just now. It didn't help.

Hello Haxton Fale,

How do you install the Hyper-v? Control panel->Turn Windows features on or off?

Please share us the step  you use SxS source to fix this issue.

Please take a look at the following thread similar to this issue.
https://social.technet.microsoft.com/Forums/en-US/45857f74-a8a3-4da1-88fd-412b00328440/0x800f0906-and-0x800f081f-errors-while-enabling-hyperv-feature?forum=w8itpronetworking
1.Right click the Windows  iso you have downloaded and mount it .
2.Get into the drive and copy the sxs folder to a different drive (For example Z:).
3.Run the following code(as an administrator ):
dism /online /enable-feature /featurename:microsoft-hyper-v-all /All /LimitAccess /Source:Z:\sxs

Best regards,
Fangzhou CHEN

I tried using the Turn Windows features on and off window, and I tried DISM in the console as administrator.

I tried to specify the SxS source as an extra folder in the Group Policy, both straight from the mounted disk and after copying it to my local hard drive. I also tried both ways in the console, and all I get is the process stuck at 66% and then failing, saying that there is no source and I can specify it using the /source switch - which I do, in spite of it claiming otherwise.

Hello Haxton Fale,

Run the command dism /online /enable-feature /featurename:microsoft-hyper-v-all /All /LimitAccess /Source:Z:\sxs, and then get the error message about there is no source and stuck in 66%?

Please navigate to the C:\WINDOWS\Logs\DISM.
Upload and share the dism.log with us for analyzation.
Upload to OneDrive: http://windows.microsoft.com/en-us/onedrive/add-photos-files
Share files: http://windows.microsoft.com/en-us/onedrive/share-file-folder

Best regards,
Fangzhou CHEN

I've looked at the log myself and it says nothing beyond not being able to find the source. Here it is: http://1drv.ms/15NX0xF

I checked, then checked again, then redownloaded, checked, failed, checked that I downloaded the right one, and failed again. Unless both Dreamspark and MSDN downloads are faulty, there is nothing wrong with my Windows 8.1 ISOs.

EDIT: Just to be on the safe side, I have just redownloaded a new ISO using the Windows 8.1 installation tool. The same error occurs.

• Edited by Haxton Fale Tuesday, February 03, 2015 10:21 AM

I'm using Windows 8.1 Pro. I'm not using WSUS. I changed the group policy to allow the system to use Windows Update instead of WSUS.

The DISM log produces the exact same error - could not find sources.

As a small bonus: I have another PC with Windows 8.1 Pro. After enabling the virtualization in BIOS/CPU settings, I was able to simply download and install Hyper-V on it, without having to change anything extra, not even the group policy to allow bypassing WSUS.

• Edited by Haxton Fale Friday, February 06, 2015 11:05 AM

I tried these solutions. I assume the source for DISM was to be in a mounted Windows ISO?

The process got stuck at 20% when I used that, yielding the same error - could not find sources.

I'll probably give up on Hyper-V for now. It seems more trouble than it's worth to try installing it when the system is so against it. Thank you for your help.

• Edited by Haxton Fale 22 hours 57 minutes ago