Rob 1

The first thing I would do is to see what errors I'm getting in computer management.

Right click on my computer > left click on manage >

on the left side, double click event viewer >

And on the left side, click on Application and System, and look for the more recent errors.

If you want to clear the list to start with a fresh page, right click Application and System,
and select clear all events.

Then reboot with the drive plugged in, and see what the new errors tell you.