UWF_Overlay.SetWarningThreshold

  • Article
  • Applies to:
    ✅ Windows 11, ✅ Windows 10

Sets the warning threshold for monitoring the size of the Unified Write Filter (UWF) overlay.

Syntax

UInt32 SetWarningThreshold(
    UInt32 size
);

Parameters

size
An integer that represents the size, in megabytes, of the warning threshold level for the overlay. If size is set to 0 (zero), UWF does not raise warning threshold events.

Return Value

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

Remarks

When the size of the overlay reaches or exceeds the size threshold value, UWF writes the following notification event to the event log.

Message ID Event code Message text
UWF_OVERLAY_REACHED_WARNING_LEVEL 0x80010001L The UWF overlay size has reached WARNING level.

The warning threshold must be lower than the critical threshold.

Requirements

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