TheÂ Reliability MonitorÂ provides a system stability overview and details about events that impact reliability. It calculates the Stability Index shown in the System Stability Chart.
Reliability Monitor maintains up to a year of history for system stability and reliability events. The System Stability Chart displays a rolling graph organized by date.
The top half of the System Stability Chart displays a graph of the Stability Index. In the lower half of the chart, five rows track Reliability Events that either contribute to the stability measurement for the system or provide related information about software installation and removal. When one or more Reliability Events of each type are detected, an icon appears in the column for that date.
If more than 30 days of data are available, you can use the scroll bar at the bottom of the System Stability Chart to find dates outside the visible range.
Based on data collected, each date in the System Stability Chart includes a graph point showing that day’s System Stability Index rating. TheÂ System Stability IndexÂ is a number from 1 (least stable) to 10 (most stable) and is a weighted measurement derived from the number of specified failures seen over a rolling historical period. Reliability Events in the System Stability Report describe the specific failures. For more information about interpreting the System Stability report, see Use Reliability Monitor to Troubleshoot.
This tutorial will show you how to view reliability history for your Windows 11 device.