The Following Error 0xc0000035 [2021] | Session Windowsupdatetracelog Failed To Start With

Stop the core update services by typing the following commands one by one, pressing after each: net stop wuauserv net stop bits net stop cryptsvc Use code with caution.

Follow these methods in order, from the simplest and most common fixes to more advanced solutions. Start with the basic checks and move down if the error persists.

Look for a folder or file named RtBackup or any files explicitly named WindowsUpdateTracelog.etl . Stop the core update services by typing the

Recreate the trace session safely (only if needed)

Another monitoring tool (e.g., Sysinternals ProcMon, custom ETW consumer) has already claimed the session name. Look for a folder or file named RtBackup

It wasn't a simple crash. The system was trying to birth a process into a space already occupied by a phantom. Two realities were fighting for the same memory address. Every time the update service tried to log its progress, it slammed into a mirror image of itself—a digital doppelgänger that shouldn't have been there.

Note: Disabling this specific trace log will stop the Event Viewer error without impacting your system's ability to download or install regular Windows updates. Step 3: Run SFC and DISM Repairs The system was trying to birth a process

He realized then that the "error" wasn't a bug; it was a footprint. Someone—or something—had hijacked the trace session to mask their movement, leaving a lingering shadow that blocked the system’s own diagnostic eyes.

. This indicates that Windows tried to start a new logging session using a name that was already in use by another active session or a session that didn't shut down properly. Because the name "collides" with an existing one, the second attempt fails, and Windows logs the error. Should You Worry? In most cases,