If the Event Viewer feels too complicated, the Reliability Monitor provides a user-friendly, timeline-based view of your PC's health.
Is your Windows 11 PC acting sluggish, crashing unexpectedly, or running "hot" (high CPU/system usage)? Checking for errors is the first step to diagnosing and fixing these issues. As of 2026, Windows 11 has robust built-in diagnostic tools that allow you to pinpoint exactly what is going wrong without needing third-party software.
Does the error happen or during a specific activity (like gaming)?
The report will flag:
Press Win + S , type Event Viewer , and press Enter. How to Check Errors: In the left pane, expand Windows Logs .
For twenty years, the Event Viewer has been the go-to log for Windows admins. It is still the most detailed source of truth.