Windows 10: No hypervisor was found; Error 0xc0351000 – Windows Sandbox

If you’re encountering the Windows Sandbox error message No hypervisor was found with error code 0xc0351000 on your Windows 10 computer, then this post is […]

This article No hypervisor was found; Error 0xc0351000 – Windows Sandbox first appeared on TheWindowsClub.com.

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How to disable hypervisor after uninstalling Sandbox feature?

No, it's Pro version still unactivated. I just installed it on spare PC to get a look at Sandbox feature and what I can do with it.

Probably it would be easier if I just describe the steps I took:

1. Created ISO with media builder 1903

2. Installed from this on clean system, deleting and recreating all disk partitions

3. Created a local user account on first start, logged in with it

4. In windows features scrolled down to Windows Sandbox and checked only it, Hyper-V features are available but I didn't check them for install

5. Reboot

6. Did few tests with the sandbox app, ran couple of programs in it, confirmed for myself that it uses Hyper-V technology for virtualization (first symptom - any other 3rd party virtualization software won't run, same error as when Hyper-V feature is installed,
this is known problem with HV in windows 10)

7. Finished with tests, removed Windows Sandbox from Features. Hyper-V feature still wasn't enabled in list of features, only Windows Sandbox was.

8. Reboot

9. Logged in, discovered I still cannot run VmWare and hypervisor is still enabled.

Currently both Hyper-V and Windows Sandbox are disabled/not installed in Windows Features window but the virtualization is enabled on the system. So I think I need to manually 'switch it off' or something.

As I wrote earlier, maybe installing and uninstalling Hyper-V would help, I just thought maybe there is a fast way to disable it in command line or registry

 

How to disable hypervisor after uninstalling Sandbox feature?

Hi, maybe someone can suggest something beside installing and uninstalling hyper-v feature. I didn't have time to try it yet, don't currently have access to PC in question.

So, I installed win10 1903 and enabled that new Sandbox feature to see how it works. After the end of test I removed it, but hypervisor it installed is still enabled on system.

Task manager shows 'Virtualization: enabled', systeminfo says 'A hypervisor has been detected' and vmware player won't start.

So now I need to somehow manually uninstall this hypervisor, any ideas? Going through anything remotely connected to windows features (dism, powershell) is no go since Hyper-V feature isn't installed so there's nothing to uninstall

 

How to disable hypervisor after uninstalling Sandbox feature?

At last I got to this PC and the solution was to run 'bcdedit /set hypervisorlaunchtype off'

This disabled the hypervisor and now everything works as I wanted.

Seems like whoever wrote the uninstallation process of Sandbox forgot this little bit