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Asked: 2026-05-20T05:03:12+00:00

Whats the purpose of this registry key? HKLM\SOFTWARE\Microsoft\WINDOWS NT\CURRENTVERSION\Winlogon\LeakTrack

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Whats the purpose of this registry key?

HKLM\SOFTWARE\Microsoft\WINDOWS NT\CURRENTVERSION\Winlogon\LeakTrack
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  1. Editorial Team

    This key has do with the registry handle leak tracking functionality within Windows. It has the following spec:

    Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Name: LeakTrack
Type: REG_DWORD
Data: 0 or 1

    If LeakTrack is set to 1 (one), Windows tracks all open registry keys and detect
    if any are leaked. This registry key is not required for normal operating
    system functionality.

    The functions in ADVAPI32.dll (the registry API) responsible for getting a
    registry key handle read this value. When the value is set
    appropriately they collect a call stack whenever they are asked to
    get a registry key under the user profile hives. Later when the registry
    keys are release closed it removes the discards the collected call stack
    information.

    It is needed only for debug sessions when memory leaks are to be tracked.
    The value is set by Microsofts UPHClean (User Profile Hive Cleanup Service )
    service for example.

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