Session Windowsupdatetracelog Failed To Start With The Following Error 0xc0000035 -

Once you have resolved the error, take these steps to ensure it does not return:

Some antivirus programs (e.g., McAfee, Norton, Bitdefender, or even some VPN filters) hook into the ETW subsystem to monitor network and process activity. If they hold a lock on the trace log object, 0xc0000035 occurs.

Temporary test:

This is a nuclear but highly effective option. It resets the Windows Update client to a clean state. Once you have resolved the error, take these

Create a .bat script with the following commands (run as Administrator):

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
net stop EventLog
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 Catroot2.old
ren C:\Windows\Logs\WindowsUpdate WindowsUpdate.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver
net start EventLog Search Windows Event Viewer (Applications and Services Logs
wuauclt /resetauthorization /detectnow

Reboot and test Windows Update again.

Windows utilizes a technology called Event Tracing for Windows (ETW) to log system activities. ETW is a high-performance, efficient tracing system that allows the OS to write logs without significantly impacting performance.

The WindowsUpdateTracelog is a specific ETW session dedicated to recording the activities of the Windows Update client. When your computer checks for updates, downloads a patch, or installs a driver, this session is supposed to record the details so that technicians can troubleshoot failures later.