Session Windowsupdatetracelog Failed To Start With The Following Error 0xc0000035 Repack Jun 2026

Press Windows Key + X and select or Command Prompt (Admin) .

Expand the EventLog-System key and look for subkeys that govern Windows Update traces (often labeled with a long string of letters and numbers in curly brackets).

This error typically indicates an initialization conflict within the Windows Event Trace session management. While it rarely causes immediate system crashes, leaving it unresolved can clutter your error logs and point to underlying configuration issues with Windows Update or diagnostic tracking. Understanding Error Code 0xc0000035 Press Windows Key + X and select or Command Prompt (Admin)

While this error rarely causes major system instability, it can fill your Event Viewer logs with warnings, making it harder to troubleshoot legitimate issues. The error is quite common in Windows 10/11 environments, particularly after major updates or when using modified OS images (repacks) where certain logging services conflict. What Does Error 0xc0000035 Mean? Error code 0xC00000350 x cap C 0000035

The word in the message refers to Windows trying to reuse or repackage the logging session, but failing because of the name clash. While it rarely causes immediate system crashes, leaving

Are you currently , or is this just an error in the logs ?

Think of it like trying to park two cars in the same reserved spot – the second car gets the error, not the parking lot. What Does Error 0xc0000035 Mean

If the error persists because the system thinks a session is already running, you must clear the ETW state. This is done via the command line (Admin privileges):

While seeing the Session "WindowsUpdateTraceLog" failed to start with the following error 0xC0000035 entry in your Event Viewer can be slightly alarming, it rarely affects the actual performance or stability of your PC. In most cases, it is a benign logging conflict.

If the error persists, reopen Command Prompt as administrator and run the DISM tool: DISM /Online /Cleanup-Image /RestoreHealth Restart your computer once the process is 100% complete.