1. System Crashes or Unexpected Reboots
- 6008 – Unexpected shutdown
- 41 (Kernel-Power) – System rebooted without clean shutdown
Log Location: Windows Logs → System
Other Related Event IDs: 1001 – Bugcheck codes (BSOD details)
6008 – Unexpected Shutdown
41 (Kernel-Power) – Rebooted without Clean Shutdown
2. Application Crashes or Freezes
- 1000 – Application Error
- 1001 – Windows Error Reporting
- 1002 – Application Hang
Log Location: Windows Logs → Application
1000 – Application Error
1001 – Windows Error Reporting
1002 – Application Hang
3. User Account Logon/Logoff Issues
- 4624 – Successful logon
- 4625 – Logon failure
- 4634 – Logoff events
Log Location: Windows Logs → Security
4624 – Successful Logon
4625 – Logon Failure
4634 – Logoff Events
4. Windows Update Problems
- Failure events and error codes indicating update issues.
Log Location: Windows Logs → System; Applications and Services Logs → Microsoft → Windows → WindowsUpdateClient → Operational
Windows Update Logs
5. Group Policy (GPO) Issues
- 7017 – GPO client-side extension errors
- 1129 – Policy processing issues at startup/logon
Log Location: Applications and Services Logs → Microsoft → Windows → GroupPolicy → Operational
Other Related Event IDs: 1058, 1030 – Problems accessing or applying GPOs
7017 – GPO Client-Side Extension Errors
1129 – Policy Processing Issues
6. Performance Issues (Slow Boot or Login)
- 100 – Boot Performance (slow boot)
- 101 – Application Performance (slow app start)
- 200 – Shutdown Performance (slow shutdown)
Log Location: Applications and Services Logs → Microsoft → Windows → Diagnostics-Performance → Operational
100 – Boot Performance
101 – Application Performance
200 – Shutdown Performance
7. Driver Issues or Device Failures
- 7000, 7001 – Driver/service failed to start
- 7026 – Driver loading failures
Log Location: Windows Logs → System
7000 – Service Failed to Start
7026 – Driver Loading Failures
8. Malware or Security Incidents
- 1116, 1117 – Malware detection (Windows Defender)
- 4625 – Multiple failed logins (possible brute force)
Log Location: Windows Logs → Security, Application, Windows Defender
1116 – Malware Detected
1117 – Malware Cleaned/Quarantined
4625 – Multiple Failed Login Attempts
9. Print Job Failures
- 307, 372 – Print job failures or issues
- 7031 – Spooler service errors
Log Location: Applications and Services Logs → Microsoft → Windows → PrintService → Operational
307 – Print Job Failure
7031 – Spooler Service Errors
Best Practices for Using Event Viewer
- Filter logs by severity and time
- Correlate events across multiple logs
- Export logs for deeper analysis and documentation