After upgrading to Windows 10 Pro, windows sees my two Seagate Expansion external USB 3.0 Drives. Windows does not see my two Seagate Backup Plus external USB 3.0 drives until I unplug then plug either the USB cable or power cable. Everything worked
fine in Window 7 Pro. The four are plugged into a 4 port PCI USB 3.0 Card. At a loss as to why now not being seen.
I am using a VANTEC Quad Chip 4-Port Dedicated 5Gbps USB 3.0 PCIe Host Card Model UGT-PCE430-4C in my computer. I have the 4 external Seagate drives plugged into it. Under windows 7, it had no issues of seeing all 4 drives when I booted up. After
the upgrade to windows 10, on bootup, windows does not see the Seagate Backup Plus drives until I unplug them and replug them either power or USB cable.
I did as you suggested and the only thing it saw was I had disabled automatically install new drivers. I changed that.
Still on reboot, windows does not see the Backup Plus drives .
OK I did a Repair on the drivers for the USB card, did a reboot, and now the drives show up. I will do some additional Reboots later to see if the issue is resolved.