Fixing Event ID 2: Session "WindowsUpdateTracelog" Failed to Start with Error 0xC0000035
If you want, I can:
Open and navigate to: C:\Windows\System32\LogFiles\WMI Locate the folder named RtBackup . Fixing Event ID 2: Session "WindowsUpdateTracelog" Failed to
Open and run:
Several factors can contribute to the occurrence of this error. One possible cause is corrupted registry entries or missing registry keys required by the Windows Update service. Malware infections or viruses can also cause this error by modifying system files and registry entries. Additionally, issues with system files, such as corrupted or missing files, can prevent the Windows Update service from functioning correctly. Conflicting software or third-party applications can also interfere with the Windows Update service, leading to this error. Malware infections or viruses can also cause this
In the context of WindowsUpdateTraceLog , Windows tries to start an event‑tracking session for update diagnostics, but that session (or a component with the same name) is already active. The collision prevents the second instance from starting, but the first one continues running normally, so the overall health of your system remains unaffected.
Since the error stems directly from the Windows Update tracing mechanism, purging the update cache usually clears the conflict. In the context of WindowsUpdateTraceLog , Windows tries
Fix: Session "WindowsUpdateTracelog" Failed to Start with Error 0xC0000035
Locate the file named WindowsUpdateTracelog.etl (or look inside the RtBackup folder if permissions permit).
In plain English: Windows is trying to start a tracing session (a log that tracks what Windows Update is doing), but it’s hitting a snag because a session with that same name or ID is already running or wasn't shut down properly. It’s like trying to save a file in a folder where a file with that exact name is already open. Is This Critical?