Hyper-v Hypervisor Is Disabled Windows 10
Keena Wiegert
Check the Hyper-V installation status in the command line before you start to uninstall Hyper-V and to make sure that this hypervisor has been removed from your Windows system after you have uninstalled Hyper-V.
You may need to disable Secure Boot in UEFI/BIOS settings of a computer to finish the uninstallation process and uninstall Hyper-V. The sequence to disable Secure Boot depends on your hardware vendor and differs for different motherboard vendors and models.
You can change Hyper-V startup options when Windows boots without uninstalling Hyper-V completely. In this case, Hyper-V is installed but inactivated. Hyper-V is not booted before Windows boots if you disable Hyper-V by using the command line bcdedit tool. Bcdedit is the command line tool to manage Boot Configuration Data or BCD. BCD store is used to describe boot parameters for applications, add boot menu entries, etc.
If you use BCD to disable Hyper-V, the Hyper-V feature is disabled but not uninstalled completely from Windows. As you remember, Hyper-V is the first-type hypervisor that boots before Windows boots. The idea of using this method is to disable Hyper-V in boot configuration.
The process of removing Hyper-V in Windows Server 2019 is slightly different compared to Windows 10. In this section, we cover how to uninstall Hyper-V in Windows Server 2019. The workflow to uninstall Hyper-V on Windows Server 2022 and 2016 is identical.
If your Windows Server is installed with the graphic experience and has a graphical user interface (GUI), then the easiest way to uninstall Hyper-V is using Server Manager and the Remove Roles and Features wizard.
If you see a message that Windows cannot uninstall Hyper-V components, try to check system files and their storage. Different error codes are displayed, for example, 0x800F0831, 0x80073701, etc. Use command line tools to fix this issue. Open the command line (CMD) with administrative privileges and run the following commands.
Hyper-V is not uninstalled because a virtual network adapter or a virtual switch created by Hyper-V is present in a host Windows system. Remove virtual Hyper-V network adapters, and try to uninstall Hyper-V again. Here are some posts about Hyper-V network adapters and virtual switches from our blog.
You disable Hyper-V but after reboot, Hyper-V is enabled again. A possible cause may be that a group policy is set to enable Hyper-V automatically on login after each boot. A system administrator should edit the group policy configuration to fix this issue. Remember, that Device Guard and Credential Guard are features using Hyper-V to work in Windows. Check Computer Configuration -> Administrative Templates -> System -> Device Guard in the group policy editor to make sure that there are no settings to force run Device Guard on a Windows machine.
Hyper-V can be uninstalled with a graphical user interface or a command line interface in Windows 10 and 11 and Windows Server 2016/2019/2022. The workflow is different for Windows 10 and Windows Server operating systems. If you have uninstalled Hyper-V, you can use another hypervisor to run virtual machines. Remember to back up your virtual machines to protect your data. NAKIVO Backup & Replication supports backup of VMware VMs as well as Hyper-V VMs.
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i try to instal Docker Desktop 2.3.0.2 (45183 on window 10 Pro versio 1909
During instalation of docker I checked enable Hyper-V. And after restart my computer. I got popup with that "Error occured: Cannot enable hyper-v service"
I checked that I have enabled Hyper-V and virtualization in BIOS.
I realize its an old thread but just want to put out what fixed mine. I had ubuntu as a dual boot with my windows 10. As soon as I removed grub and ubuntu, I could enable hyper-v easily. I think temporarily disabling grub would work fine instead of removing it like I did.
I am unable to get the the Virtualizarion enabled on my bootcamp of windows 10.Using the boot into IOS then switch to windows trick I was able to get hyper-v support to "yes" but I haven't figured out a way to enable the virtualization.I have reinstalled the Hyper-V management tools and that seems to have no affect.
I have a new macbook pro i7 with windows 8.1 installed and hyper-v started. But I cannot start any virtual machine for win server or win phone. The error reprorted was: "vm could'nt be started because hypervisor is not runnning." I read on your support pages that it should be enabled by default - but it isnt. EPT is there so it should be present.
I am running Windows 8.1 on a Macbook Pro Late 2011 installed using bootcamp with apple drivers for windows etc. I have Windows 8.1 as default startup disk. Hyper-V works fine when logged into windows as local administrator using a local account. Not sure if this will help.
It'd be nice if Apple could fix this in the BIOS (or the BIOS equivalent) so that it's always enabled. I *think* that it's enabled by the OSX OS and stays on until you reboot...and then it starts in the default "off" position. ?
I have a 2014 Mac Pro which is installed and up to date with Mavericks, I installed Server 2012 R2 through BootCamp and I cannot get hyper-v to start. Hyper-v installed ok but when I go to start the VM it gives the error stating that the hypervisor is not running.
In some cases when implementing a hardware interface in software is slow, KVMimplements its own paravirtualized interfaces. This works well for Linux asguest support for such features is added simultaneously with the feature itself.It may, however, be hard-to-impossible to add support for these interfaces toproprietary OSes, namely, Microsoft Windows.
When any set of the Hyper-V enlightenments is enabled, QEMU changes hypervisoridentification (CPUID 0x40000000..0x4000000A) to Hyper-V. KVM identificationand features are kept in leaves 0x40000100..0x40000101.
Provides HV_X64_MSR_VP_INDEX (0x40000002) MSR to the guest which has Virtualprocessor index information. This enlightenment makes sense in conjunction withhv-synic, hv-stimer and other enlightenments which require the guest to know itsVirtual Processor indices (e.g. when VP index needs to be passed in ahypercall).
Enables two Hyper-V-specific clocksources available to the guest: MSR-basedHyper-V clocksource (HV_X64_MSR_TIME_REF_COUNT, 0x40000020) and Reference TSCpage (enabled via MSR HV_X64_MSR_REFERENCE_TSC, 0x40000021). Both clocksourcesare per-guest, Reference TSC page clocksource allows for exit-less time stampreadings. Using this enlightenment leads to significant speedup of all timestamprelated operations.
Enables Hyper-V synthetic timers. There are four synthetic timers per virtualCPU controlled through HV_X64_MSR_STIMER0_CONFIG..HV_X64_MSR_STIMER3_COUNT(0x400000B0..0x400000B7) MSRs. These timers can work either in single-shot orperiodic mode. It is known that certain Windows versions revert to using HPET(or even RTC when HPET is unavailable) extensively when this enlightenment isnot provided; this can lead to significant CPU consumption, even when virtualCPU is idle.
Enables paravirtualized TLB shoot-down mechanism. On x86 architecture, remoteTLB flush procedure requires sending IPIs and waiting for other CPUs to performlocal TLB flush. In virtualized environment some virtual CPUs may not even bescheduled at the time of the call and may not require flushing (or, flushingmay be postponed until the virtual CPU is scheduled). hv-tlbflush enlightenmentimplements TLB shoot-down through hypervisor enabling the optimization.
Enables paravirtualized IPI send mechanism. HvCallSendSyntheticClusterIpihypercall may target more than 64 virtual CPUs simultaneously, doing the samethrough APIC requires more than one access (and thus exit to the hypervisor).
Provides HV_X64_MSR_RESET (0x40000003) MSR to the guest allowing it to resetitself by writing to it. Even when this MSR is enabled, it is not a recommendedway for Windows to perform system reboot and thus it may not be used.
The enlightenment is nested specific, it targets Hyper-V on KVM guests. Whenenabled, it provides Enlightened VMCS version 1 feature to the guest. The featureimplements paravirtualized protocol between L0 (KVM) and L1 (Hyper-V)hypervisors making L2 exits to the hypervisor faster. The feature is Intel-only.
Note: some virtualization features (e.g. Posted Interrupts) are disabled whenhv-evmcs is enabled. It may make sense to measure your nested workload with andwithout the feature to find out if enabling it is beneficial.
This enlightenment tells guest OS that virtual processors will never share aphysical core unless they are reported as sibling SMT threads. This informationis required by Windows and Hyper-V guests to properly mitigate SMT related CPUvulnerabilities.
Enables Hyper-V synthetic debugger interface, this is a special interface usedby Windows Kernel debugger to send the packets through, rather than sendingthem via serial/network .When enabled, this enlightenment provides additional communication facilitiesto the guest: SynDbg messages.This new communication is used by Windows Kernel debugger rather than sendingpackets via serial/network, adding significant performance boost over the othercomm channels.This enlightenment requires a VMBus device (-device vmbus-bridge,irq=15).
The enlightenment is nested specific, it targets Hyper-V on KVM guests. Whenenabled, it allows L0 (KVM) and L1 (Hyper-V) hypervisors to collaborate toavoid unnecessary updates to L2 MSR-Bitmap upon vmexits. While the protocol issupported for both VMX (Intel) and SVM (AMD), the VMX implementation requiresEnlightened VMCS (hv-evmcs) feature to also be enabled.
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