The ETW session configuration is stored in the Windows Registry. Leftover or corrupted registry entries for the Microsoft.Windows.WindowsUpdate.RUXIMLog session can cause the system to believe a session is still active even after a reboot.

Search for Microsoft Update Health Tools .

Based on community reports and technical analyses, several triggers have been identified:

This error can prevent updates from appearing, cause update failures, or lead to "Something went wrong" messages in the Windows Update UI. What is microsoftwindowswindowsupdateruximlog?

The error can also arise if essential Windows system files have become corrupted, either by faulty software installations, abrupt shutdowns, or malware activity. When the system attempts to register a tracing session with a name that is already in use—especially one that was not properly cleaned up after a previous crash—the collision error occurs.

If this guide resolved your issue, consider sharing it with others who might be searching for the same cryptic error. And if you have additional insights or alternative fixes, contribute to the community—troubleshooting Windows is a collective effort.

For those who cannot abide the red "X" in Event Viewer, a few community-sourced fixes have emerged:

: If the component is trying to run a campaign that is no longer valid for your system. How to resolve it

Right-click the Microsoft.Windows.WindowsUpdate.RUXIMLog folder and select .

if you are on a personal machine or an enterprise/managed environment.

alongside this log error, or is the error message the only symptom? Troubleshoot problems updating Windows - Microsoft Support

This error typically does prevent Windows Update from installing security patches or feature updates. It’s more of an annoyance than a system threat.

Two processes are trying to use the same name, or the service is attempting to create a log that already exists. Solutions to Fix RUXIMLog Failed to Start Follow these steps in order to eliminate the error. 1. Run System File Checker (SFC) and DISM

– This indicates that a service, task, or logging session attempted to initialize in "full" mode (as opposed to lightweight or diagnostic mode) but could not do so. The system therefore skipped it or marked it as failed.

Follow these troubleshooting steps in sequence to safely resolve the issue on Windows 10 or Windows 11. Step 1: Clear the Autologger Registry Entry

Some driver packages create a scheduled task named Ruximlog_Task or similar.