Hi William,
This may be related to selective USB suspend, which will shut down USB devices after a period of “inactivity”. Please confirm the following settings:
Under Control Panel -> Power Options -> Change plan settings. Make sure that Windows power options are set to “High performance” and if this is a laptop, make sure the AC adapter is plugged in. Also under Change plan settings -> Change advanced power settings set USB settings -> USB selective suspend setting to Disabled and PCI Express -> Link State Power Management to Off
Fast startup can be disabled under Control Panel -> Power Options -> "Choose what the power buttons do" -> "Change settings that are currently unavailable". Then uncheck "Turn on fast startup" and click Save changes