# vmms.exe

Windows Process: Microsoft Corporation

Also called vmms, hyper-v virtual machine management, vmms service

Windows, System Component

Hyper-V Virtual Machine Management Service. It manages Hyper-V VMs on SKUs that include Hyper-V. It is not WSL's wslservice.exe.

## What you need to know

vmms is Hyper-V management, not WSL's wslservice.

vmms.exe is Virtual Machine Management Service. Hyper-V Manager talks here. wslservice.exe coordinates WSL distributions. vmcompute.exe is Host Compute Service. Ending vmms does not shut down Ubuntu the way \`wsl --shutdown\` does.

- **Safe?**: Yes, when Hyper-V is installed

  **Same as wslservice?**: No. This is Hyper-V management

  **Should I end it?**: Hyper-V VMs lose management

Feex says

If I see vmms on a SKU with Hyper-V, I treat it as VM management. I do not look for Ubuntu in this process, and I do not end wslservice to stop Hyper-V Manager.

## What is vmms.exe?

vmms is Hyper-V management, not WSL's wslservice. It is the Virtual Machine Management Service. wslservice.exe only coordinates WSL. Swapping those names is wrong.

## What does it do?

It creates, starts, and configures Hyper-V VMs. Worker processes are vmwp.exe, one per running VM. It does not host \`wsl -l -v\`.

## Why is it running?

Hyper-V is installed and something opened the management stack. Home SKUs without Hyper-V should not show a normal System32 vmms.

## Is it safe?

Usually safe

System32 vmms.exe is Hyper-V VMMS. A vmms.exe in Downloads is not. This is still not WslService.

A legitimate copy normally runs from:

`C:\Windows\System32\vmms.exe`

- Service: Hyper-V Virtual Machine Management
- Workers: vmwp.exe, one per VM
- Not wslservice.exe

## Can I end it?

Hyper-V management drops

Ending vmms.exe disconnects Hyper-V Manager and can stall VM control. Running vmwp copies may linger. That is not \`wsl --shutdown\`.

## Can I remove it?

Remove the Hyper-V role, not the file

Turn Hyper-V off from Windows features if you do not want VMMS. Do not delete System32\vmms.exe. Uninstalling WSL does not remove this service.

## Should it start with Windows?

The vmms service starts when Hyper-V needs management. It is not a WSL Startup entry.

## Normal resource behavior

These are contextual labels, not universal averages.

- **CPU**: Low unless many VMs are changing state

  **Memory**: Moderate for the management service

  **Disk**: Config and VHD access through workers

  **Network**: Live migration and management, not mstsc by itself

## File information

| Executable name        | vmms.exe                     |
| ---------------------- | ---------------------------- |
| Common legitimate path | C:\Windows\System32\vmms.exe |
| Publisher              | Microsoft Corporation        |
| Signature expectation  | Signed by Microsoft Windows  |

## Common problems

### People stop WslService to close Hyper-V Manager

Hyper-V Manager talks to vmms. WSL has its own service. Two consoles, two processes.

### VMs still run after they ended vmms

vmwp.exe is the per-VM worker. Management died. The guest may still be on the worker.

## Troubleshooting

Diagnose before you change anything destructive.

### Hyper-V Manager and services.msc: Virtual Machine Management

If that snap-in fails, this service is the article. wsl -l -v failing is wslservice, not vmms.

### Do not disable Host Compute Service to "fix Hyper-V"

vmcompute is HCS. Repair or restart vmms for classic VMs. Leave System32 files in place.

## Technical details

Technical details

| Image name | vmms.exe                           |
| ---------- | ---------------------------------- |
| Service    | Hyper-V Virtual Machine Management |

## Related

These entities connect to this article. Type is shown on every link.

[vmwp.exe: Windows Process](https://feex.it/wiki/process/vmwp.exe)[vmcompute.exe: Windows Process](https://feex.it/wiki/process/vmcompute.exe)[wslservice.exe: Windows Process](https://feex.it/wiki/process/wslservice.exe)

## Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. [How we research](https://feex.it/wiki/research).

- [Microsoft Learn: Hyper-V technology ](https://learn.microsoft.com/windows-server/virtualization/hyper-v/hyper-v-technology-overview)· Hyper-V Virtual Machine Management Service
- [Microsoft Learn: manage Hyper-V ](https://learn.microsoft.com/windows-server/virtualization/hyper-v/manage/manage-hyper-v)· vmms manages VMs, workers run them
- [Foxhole process map ](https://foxhole.feex.it/)· First-party samples on Windows PCs. Not a lab benchmark.

## Was this article useful?

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Quick facts

The short identity of this page. Specs, sources, and the full story stay in the article.

- **Type**: Windows Process

  **Publisher**: Microsoft Corporation

  **Executable**: vmms.exe

  **Typical path**: C:\Windows\System32\vmms.exe

  **Mapped by Feex**: Seen on Windows PCs in Foxhole

  **Related service**: vmms / Hyper-V Virtual Machine Management

Feex Reviewed: Last verified August 2026

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Source: [Canonical Feex Wiki page](https://feex.it/wiki/process/vmms.exe/)

[Developer guide](https://feex.it/wiki/developers/) | [API policy](https://feex.it/developers/api-policy/) | [Agent guidance](https://feex.it/wiki/llms.txt)