Session Windowsupdatetracelog Failed To Start With The Following Error 0xc0000035 [2027]

| Cause | Description | |-------|-------------| | | A previous instance of the trace session was not properly closed (often due to a crash or forced shutdown). | | Corrupt Windows Update database | The SoftwareDistribution or Catroot2 folders contain inconsistent data. | | Security software interference | Third-party antivirus or endpoint detection tools may block or hold the trace log object. | | Disk or permission corruption | The C:\Windows\Logs\WindowsUpdate folder is corrupt, missing, or has incorrect ACLs. | | Incomplete Windows Update | A prior update was interrupted during the "initializing" phase. |

If the tracing session is forced to start automatically despite conflicts, modifying its startup configuration in the Windows Registry will stop the error loop.

A: Yes, Windows Server 2016, 2019, and 2022 can also experience 0xc0000035 with the same trace log session. The fixes are identical.

However, if it's accompanied by system issues or failing updates, the steps outlined above provide a complete roadmap to resolution. Start with the built-in troubleshooters and system file checks, then move on to driver updates and registry modifications if needed. With patience and a systematic approach, you can resolve this error and restore your system to a fully functional state without the clutter of recurring log entries. | Cause | Description | |-------|-------------| | |

The trace log session writes to C:\Windows\Logs\WindowsUpdate . Corruption in this folder or its parent can prevent session creation.

| Cause | Description | |-------|-------------| | | Corrupted system files remain the most common culprit. The SFC tool often detects corruption after this error appears. | | Update conflicts | A problematic Windows Update has triggered this error for many users. | | Corrupt Windows Update components | Damaged SoftwareDistribution folder or Catroot2 files can prevent proper trace log initialization. | | Faulty registry entries | Corrupt or orphaned Autologger registry keys under WMI can cause session start failures. | | Microsoft Update Health Tools | This utility sometimes creates conflicts that produce the error. | | USB or external devices | Connected USB devices during update processes have been known to trigger the error. | | RAM issues | A Microsoft Q&A thread reports RAM problems as a potential cause. | | WSUS deployment issues | Organizations using WSUS for Windows 11 24H2 cumulative updates encountered this error during the KB5063878 rollout. |

Understanding the root cause helps in applying the right fix. The error is typically triggered by one of the following: | | Disk or permission corruption | The

The 0xc0000035 error is rarely a "system killer." It’s a minor conflict in how Windows tracks its own update progress. By clearing the folder or restarting the update services, you usually tell Windows to stop overthinking and start the log fresh.

Editing the registry can be risky. Always back up your registry or create a system restore point before proceeding.

While this error rarely causes immediate system crashes or blue screens, it floods your Event Viewer logs and indicates a conflict in how Windows Update tracks its internal performance and diagnostic data. This comprehensive guide details why this happens and provides step-by-step methods to resolve it. Understanding the Root Cause A: Yes, Windows Server 2016, 2019, and 2022

: The previous update log session did not terminate cleanly.

Note: Disabling the tracer via 0 stops the diagnostic collision. Windows Update will still function normally and will automatically recreate or restart clean tracking logs when required. Step 3: Run SFC and DISM Repairs

If you are auditing your Windows Event Viewer, you might frequently encounter a critical or error-level event from the source. The log states: Session "WindowsUpdateTracelog" failed to start with the following error: 0xc0000035 .

If the entry appears duplicated or corrupted, right-click it and select . Windows will safely recreate a clean version when next required. Method 4: Run SFC and DISM Repairs

: This is an Event Trace Log (ETL) session utilized by the Windows Update mechanism to track, log, and diagnose the background installation of updates and patches.