How to Fix Event Viewer Not Opening or Crashing on Launch on Windows
Event Viewer won't open, shows a blank window, or crashes with an MMC error? Fix Event Viewer issues on Windows 10 and 11.
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Main Troubleshooting Guide
How to Fix High CPU Usage →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •Event Viewer opens but shows a blank white window — no logs visible
- •"MMC has detected an error in a snap-in and will unload it"
- •Event Viewer crashes immediately after opening
- •eventvwr.msc hangs at "Connecting to Event Log Service"
- •"The Event Log service is not available" error
- •Custom views missing or all logs showing 0 events
- •Right-click "Open Event Viewer" does nothing
Common Causes
- ⚠Windows Event Log service stopped or disabled
- ⚠Corrupted event log files (.evtx) in the Logs folder
- ⚠MMC snap-in cache corrupted
- ⚠Insufficient permissions to access event logs
- ⚠Event log file size exceeded maximum allowed limit
- ⚠Third-party log management tool interfering
- ⚠System file corruption affecting eventvwr.msc
Solutions
Solution 1: Start the Event Log Service
- 1Open Services (Win+R → services.msc)
- 2Find "Windows Event Log" in the list
- 3Right-click → Properties → set Startup type to "Automatic"
- 4Click Start to start the service
- 5If it fails to start: check the Dependencies tab for stopped services
- 6Common dependency: "Remote Procedure Call (RPC)" must be running
- 7After starting: try opening Event Viewer again
Solution 2: Clear Corrupted Log Files
- 1If Event Viewer hangs or crashes, a log file may be corrupted:
- 2Navigate to: C:\Windows\System32\winevt\Logs
- 3Sort by Size — look for extremely large files (>100MB)
- 4Rename or delete the oversized .evtx file (e.g., Application.evtx.bak)
- 5Windows will recreate a fresh log file automatically
- 6If unsure which file: rename the entire Logs folder and restart the Event Log service
- 7Note: this clears historical logs — new events will be recorded normally
Solution 3: Reset MMC Snap-in Cache
- 1If the MMC error appears:
- 2Close Event Viewer completely
- 3Navigate to: %APPDATA%\Microsoft\MMC
- 4Delete all files in this folder
- 5This clears cached snap-in configurations
- 6Reopen Event Viewer — it will rebuild the cache
- 7If still failing: run sfc /scannow to repair eventvwr.msc
Solution 4: Repair System Files
- 1Open Command Prompt as Administrator
- 2Run: sfc /scannow
- 3If issues found: DISM /Online /Cleanup-Image /RestoreHealth then sfc again
- 4Also try opening Event Viewer via command line: eventvwr.msc
- 5If command line works but GUI doesn't: the shortcut may be broken
- 6Recreate shortcut: right-click desktop → New → Shortcut → eventvwr.msc
- 7Restart and test Event Viewer
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