xda-developers[.]com/using-windows-reliability-monitor-for-system-stability/
learn.microsoft[.]com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc749583(v=ws.10)
learn.microsoft[.]com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc749032(v=ws.10)?redirectedfrom=MSDN
Right click the Start Button, click Run, type perfmon /rel, click OK. You'll see points plotted along a graph - click any one for more info. There's an alternative here if you want to check it out:
github[.]com/SMSAgentSoftware/ReliabilityViewer/releases/tag/v2.0