Hyper-V Volume Shadow Copy Requestor (vmicvss) Service Defaults in Windows 10

Coordinates the communications that are required to use Volume Shadow Copy Service to back up applications and data on this virtual machine from the operating system on the physical computer.

Default Settings

Startup type:Manual
Display name:Hyper-V Volume Shadow Copy Requestor
Service name:vmicvss
Service type:share
Error control:normal
Path:%SystemRoot%\system32\svchost.exe -k LocalSystemNetworkRestricted -p
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vmicvss
  • SeChangeNotifyPrivilege
  • SeBackupPrivilege

Default Behavior

Hyper-V Volume Shadow Copy Requestor is a Win32 service. In Windows 10 it is starting only if the user, an application or another service starts it. When the Hyper-V Volume Shadow Copy Requestor service is started, it is running as LocalSystem in a shared process of svchost.exe along with other services. If Hyper-V Volume Shadow Copy Requestor fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the vmicvss service has failed to start due to the error.

Restore Default Startup Configuration for Hyper-V Volume Shadow Copy Requestor

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config vmicvss start= demand

3. Close the command window and restart the computer.

The vmicvss service is using the icsvcext.dll file that is located in the %WinDir%\System32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.