FolderRisk: Caution
Documents\Hyper-V\Virtual Hard Disks C:\Users\Public\Documents\Hyper-V\Virtual Hard Disks
Former default location of Hyper-V virtual hard disks (.vhd, .vhdx); Hyper-V also runs on Windows 10 and 11, not only on Windows Server.
What it’s for
Hyper-V virtual hard disks (.vhd, .vhdx) were created here by default on the first releases of the role, under the Public documents folder. Recent versions default to C:\ProgramData\Microsoft\Windows\Virtual Hard Disks, so you mostly meet this folder on older, migrated or hand-configured hosts. Hyper-V is available on client editions (Pro, Enterprise, Education) as well as on Windows Server, so the folder is not server-specific.
What it contains
- The .vhd and .vhdx files of the virtual machines, including the differencing disks (.avhdx) created by checkpoints.
- A disk is referenced by its full path in the VM configuration: moving it by hand breaks the link.
- Configuration files (.vmcx, .vmrs) are not stored here; they live in the VM configuration folder, see
Get-VMHost.
Risks and best practices
- The folder sits under Public and is readable by every local user: a copy of a virtual disk exposes the whole VM (password hashes, secrets). Move VM storage to a dedicated volume with restricted permissions.
- To relocate a disk, shut the VM down and use
Move-VMStorageorMove-VHDinstead of Explorer, so the configuration is updated and the VM-specific ACLs are kept. - Change the host default with
Set-VMHostso new VMs no longer land here.
Useful commands
# Default locations configured on the hostGet-VMHost | Select-Object VirtualHardDiskPath, VirtualMachinePath
# Disks used by each VMGet-VM | Get-VMHardDiskDrive | Select-Object VMName, Path
# Disk details (maximum size, actual size, parent if any)Get-VHD -Path 'C:\Users\Public\Documents\Hyper-V\Virtual Hard Disks\vm01.vhdx'
# New default location (as administrator)Set-VMHost -VirtualHardDiskPath 'D:\Hyper-V\Disks' -VirtualMachinePath 'D:\Hyper-V\VM'