Summary: Use Windows PowerShell to determine the stability of your system.
How can I use Windows PowerShell 4.0 on my laptop running Windows 7 to find out how stable my system is?
Use the Get-CimInstance cmdlet to query the Win32_ReliabilityStabilityMetrics, and pipe
the result to Measure-Object to determine the average value of the SystemStabilityIndex:
Get-CimInstance Win32_ReliabilityStabilityMetrics | measure SystemStabilityIndex -Average