Session Windowsupdatetracelog Failed To Start With The Following Error 0xc0000035 Free <SAFE>

If the error is flooding your Event Viewer and you want to stop it specifically:

The error 0xc0000035 associated with the failure to start the WindowsUpdateTraceLog session indicates a specific naming conflict within the Windows Event Tracing for Windows (ETW) subsystem. When the Windows Update service attempts to start an ETW trace session for diagnostic logging, it fails because an AutoLogger session with the same name is already registered in the registry but not active, or a stale session entry exists. This paper details the root cause, diagnostic steps, and resolution methods for this error. If the error is flooding your Event Viewer

net stop wuauserv net stop cryptSvc net stop bits net stop msiserver Use code with caution. Copied to clipboard Rename the cache folders: net stop wuauserv net stop cryptSvc net stop

a previous session didn't close properly or a background process is conflicting with it Microsoft Learn and resolution methods for this error.

logman stop "UpdateSessionOrchestration" -ets logman stop "WindowsUpdate" -ets

ren C:\Windows\System32\catroot2 catroot2.old ren C:\Windows\SoftwareDistribution SoftwareDistribution.old