0x00040202 Fix: No Subscribers for Event Delivery

The 30-Second Fix: Restart Event Viewer

This error shows up when Event Viewer or another tool that subscribed to events loses its connection. Most common scenario: you open Event Viewer, see this error in the System log, and nothing's actually broken. The event was delivered fine — nobody was listening because the subscription dropped.

Here's the quick fix:

1. Close Event Viewer completely.
2. Open Command Prompt as admin.
3. Run: net stop eventlog && net start eventlog
4. Reopen Event Viewer.

Had a client last month whose entire print queue died because of this. Their monitoring tool subscribed to print events, then lost the subscription. Restarting the service brought everything back. Takes 30 seconds.

The 5-Minute Fix: Check WMI Subscriptions

If restarting Event Viewer didn't work, the issue is deeper — usually in Windows Management Instrumentation (WMI). This error pops up when a permanent WMI event subscription stops working. Happens after Windows updates or when a service crashes silently.

Step 1: Check WMI service status

Run this in an admin command prompt:

sc query winmgmt

If it shows STOPPED, restart it:

net stop winmgmt && net start winmgmt

Step 2: List active WMI subscriptions

Open PowerShell as admin and run:

Get-WmiObject -Namespace root\subscription -Class __EventFilter | Select-Object Name, Query

You'll see all event filters. If you find one from a third-party app (antivirus, backup software, monitoring tool), that's your culprit. Delete it with:

Get-WmiObject -Namespace root\subscription -Class __EventFilter -Filter "Name='YourFilterName'" | Remove-WmiObject

Step 3: Rebuild the subscription

If you know what subscription was supposed to be there, recreate it. Otherwise, reboot the machine — Windows will recreate default subscriptions on next startup.

This happened on a Server 2016 box I worked on last week. A backup agent's WMI subscription broke after a patch Tuesday update. Removing and reinstalling the backup software fixed it, but just deleting the filter and rebooting worked as a quick band-aid.

The 15-Minute Fix: Repair Event Log and WMI Repository

If you're still seeing 0x00040202 after all that, something's corrupt. Either the event log files themselves or the entire WMI repository is hosed. This is rare but real — I've seen it twice in 10 years.

Step 1: Backup and clear the event logs

Open Event Viewer, right-click each log (System, Application, Security), choose Save All Events As. Save them to a folder. Then right-click again and Clear Log.

Step 2: Reset the WMI repository

This is the nuclear option. Don't do it on a production server unless you've got a backup.

Run in admin command prompt:

winmgmt /salvagerepository

This salvages what it can. If it fails, try:

winmgmt /resetrepository

This resets the repository to default Windows settings. You'll lose any custom WMI subscriptions from third-party software — they'll need to be reinstalled.

Step 3: Re-register WMI components

Open admin command prompt and run these:

cd /d %windir%\system32\wbem
for /f %s in ('dir /b *.dll') do regsvr32 /s %s
wmiprvse /regserver
winmgmt /regserver

Step 4: Reboot

Last step always — reboot the machine. After reboot, check Event Viewer. The 0x00040202 error should be gone. If not, you've got deeper hardware or driver issues, but that's a different article.

What Actually Causes This Error

Under the hood, this error code means the Event Tracing for Windows (ETW) system delivered a notification to a session that had already closed its subscription. Happens when:

• A monitoring tool or service crashes
• Event Viewer is left open and the system hibernates or sleeps
• WMI repository gets corrupted after a failed update
• A permanent event consumer gets unregistered unexpectedly

The good news: it's almost never a sign of hardware failure. It's a software subscription mismatch. Nine times out of ten, restarting Event Viewer or the Event Log service fixes it. Save the WMI repository reset for when nothing else works.