Not sure if this is a hardware or software issue but thought I's start by posting it here.
I have a desktop PC which I upgraded to Windows 10 without incident before the deadline. All was going well including last night, but this morning something changed. I started the PC and it went through part of the initial start-up but then seemed stuck on a blank screen. After waiting some time I lost patience and restarted the computer using the power button. This time it did complete the start up but with one important change. All rear USB ports has stopped working. So the keyboard, mouse and external drive did not work. All still had power. I could see the light under the mouse but there was no pointer on the screen, and when I unplugged and replugged the external drive, it's disc spun but the drive did not appear in windows explorer and the light on the drive did not come on. I have 2 usb ports on the front of the PC and I moved the mouse and keyboard to the front ports and they worked fine. When I rebooted the computer the problem with the rear ports remained. I did briefly notice a small box come up on the bottom right corner mentioning something about the Windows Firewall but it was gone so fast I didn't get a chance to look at it.
Anybody got any ideas? I've heard about this power management issue and haven't tried fixing for that yet but given there is still power coming from the ports is it even worth bothering? There was a windows security update which loaded the day before according to the records on the PC after 3 failed attempts. Could this have something to do with it?
Thanks in advance.