I initially wrote this story in 2016, but as Windows 10 has evolved over time, some of the steps have changed a bit. When that happens, users would be well advised to break out the following routine to help them set things back to rights.
This often takes the form of worsening performance or stability, and can originate from damage to, loss of, or corruption of Windows system files typically found in the C:\Windows folder hierarchy. Sometimes a Windows 10 system starts misbehaving to the point where repair is needed.
