By john Windows has kept a visual diary of your PC’s problems for years, plotting every crash, error, and installation on a timeline you can read at a glance. Almost nobody knows it exists, because it is buried behind a command rather than sitting in Settings. For diagnosing the question that matters most, “when did this start?”, it beats https://saborcitosrestaurant.com/ Event Viewer comfortably.
Opening It
Press Windows+R and run perfmon /rel. Alternatively, search for “reliability” and choose View reliability history.
What appears is a chart: days along the bottom, a stability score plotted across them, and symbols marking events. Red circles are critical events like crashes and application failures. Yellow triangles are warnings. Blue circles are informational, typically software installations and updates.
Why It Beats Event Viewer for This Job
Event Viewer holds more detail, but it is a firehose. Thousands of entries, most of them normal noise, with no sense of shape. Opening it and hunting for errors teaches you nothing, because every healthy PC has errors.
Reliability Monitor solves the presentation problem. It shows only events that mattered, arranged in time, so patterns are immediately visible. You are not reading logs; you are looking at a picture of your PC’s health over weeks.
Its Real Superpower: Correlation
Here is what makes it genuinely valuable. Because installations and updates appear on the same timeline as failures, you can see cause and effect directly.
If crashes begin appearing three days ago, and a driver update or Windows update sits on the timeline three days ago, you have a suspect in seconds. That single observation replaces hours of guessing. It also answers the opposite question: if your problem predates a change you suspected, that change is exonerated.
This is precisely the question people find hardest, since human memory for “when did this start” is unreliable and things change without our involvement.
Reading It Sensibly
Click any marker for details, including the failing component and often the technical identifiers you would search for.
Two cautions. First, the stability score is a rough index, not a diagnosis; a dipping line matters less than what the markers say. Second, some red marks are ordinary, an app crashing once is not a system problem. Look for clusters and changes in pattern, not individual entries.
When to Reach For It
Use it first whenever your question involves time: when did this start, did that update cause this, is this getting worse. It is also ideal for intermittent problems, where a pattern across weeks is invisible day to day but obvious on a chart.
The Takeaway
Reliability Monitor turns your PC’s history into a picture, plotting crashes alongside the updates and installations that might have caused them. It answers “when did this start and what changed then?” faster than any other built-in tool. It costs one command to open, and most people never have.