Session Windowsupdate_trace_log Failed To Start With The Following Error: 0xc0000035 __hot__ Jun 2026

sfc /scannow

Windows Update utilizes the Event Tracing for Windows (ETW) infrastructure to log diagnostic information regarding the detection, download, and installation of updates. The specific session mentioned, WindowsUpdate_trace_log , is a real-time or file-based trace session initiated by the Windows Update Agent (WUA).

I can provide specific or troubleshooting steps based on those details. sfc /scannow Windows Update utilizes the Event Tracing

This error occurs when the service attempts to initialize a logging session (like WindowsUpdate_trace_log or RUXIMLog ) but finds that an existing session or temporary log file with the same name hasn't been properly cleared from a previous run. Recommended Fixes

The error "Session 'WindowsUpdate_trace_log' failed to start with the following error: 0xc0000035" is a common Event Viewer entry that often surfaces during system boots or update cycles. While it looks like a critical system failure, it usually points to a logging conflict rather than a broken operating system. What Does Error 0xc0000035 Mean? This error occurs when the service attempts to

If your Windows Updates are installing successfully and your system is stable, this error is often "cosmetic." It is safe to ignore if it only appears once per boot and does not coincide with system crashes (BSOD). To help you get the best result, let me know:

The code 0xc0000035 translates to STATUS_OBJECT_NAME_COLLISION. In plain English, this means the Windows Update service tried to start a new tracing session using a name that was already in use by an active session. Because the name "WindowsUpdate_trace_log" was already claimed, the second attempt failed. Common Causes What Does Error 0xc0000035 Mean

In the context of an ETW session (specifically WindowsUpdate_trace_log ), this error does not imply that two sessions have the same "Friendly Name," but rather that the specified for the trace (e.g., WindowsUpdate_trace_log.etl ) is currently locked by a system process or was not properly cleaned up during a previous session crash.

The error 0xc0000035 in Windows, particularly when related to windowsupdate_trace_log or Windows Update components, typically means or "The network response was not in the expected format" or sometimes "The path was not found" depending on context.