If the error started recently, restore to a point before the issue appeared.
If you are looking to resolve this error or "patch" the system to prevent it, follow these steps in order of least invasive to most invasive.
The (Reusable User Experience Integration Manager) is a modern component of Windows Update. It is responsible for handling the user interface elements and "marketing" interactions—such as the notification flyouts that tell you a reboot is required or that a new version of Windows is ready. The "failed to start" error usually occurs because:
The error message "Session 'Microsoft.Windows.WindowsUpdate.RUXIMLog' failed to start" If the error started recently, restore to a
The tool will scan your system, attempt to restart related services, clear caches, and recommend fixes. Follow the on-screen prompts and restart your PC after completion.
This error typically appears in the (Event ID 2) and indicates that a specific logging session for the Windows Update Readiness UX Integration Manager (RUXIM) could not start. While it looks alarming, it is often a "Status Object Name Collision," meaning a log file with that name already exists and the system is confused. 🛠️ Quick Fixes
Follow up with this command to repair the Windows image: DISM /Online /Cleanup-Image /RestoreHealth . 3. Reset Windows Update Components It is responsible for handling the user interface
Corruption in the Windows Update database or system files is the most frequent cause of this failure. Fix Windows Update corruptions and installation failures
If you are a system administrator examining a machine that has already been "patched" and is now throwing this error, the likely scenario is that the patch installation succeeded, but the post-installation cleanup failed to update the service registration.
As of late March and April 2026, several Windows Update issues have been reported and subsequently addressed: KB5079391 Withdrawal : Microsoft recently pulled the This error typically appears in the (Event ID
Let’s break down the keyword string: microsoftwindowswindowsupdateruximlog failed to start patched
This is the safest and often most effective first step. Windows includes an automated troubleshooter specifically designed to detect and resolve common Windows Update issues.
to see if this error is causing actual update failures or just background logging noise?