Safely shuts down a system protected by UWF, even if the overlay is full.


UInt32 ShutdownSystem();



Return Value

Returns an HRESULT value that indicates WMI status or a WMI error.


You must use an administrator account to call this method.

If the overlay is full, or near full, shutting down or restarting the system normally can cause the system to take an extremely long time to shut down. This occurs when the system repeatedly tries to write files during shutdown, which constantly fail due to the overlay being full. You can call this method to safely shutdown a system by avoiding this scenario.

If the overlay becomes full while the system is performing a large amount of writes, such as copying a large group of files, calling this method can still result in a long shutdown time.


Windows Edition Supported
Windows 10 Home No
Windows 10 Pro No
Windows 10 Enterprise Yes
Windows 10 Education Yes


Unified Write Filter