My recently-acquired desktop runs Windows 7 and has 4 USB ports. These are connected to an external hard drive, a memory stick, a drawing tablet and a 4-way hub itself connected to a couple of memory sticks and a printer. When I fire up the desktop none of these peripherals are visible. I have to use the troubleshooter to fix the drivers. A message states that there was a driver problem with the Intel 10H10 Family USB Universal Host Controllers 3A34, 3A35, 3A36, 3A38, 3A39, 3A3A, 3A3C, as well as the USB Mass Storage Device. It all works eventually but why do I have to do this every time I start up?
The 4-way hub is not separately powered, as far as I know - which isn't much! I didn't realise that some hubs would require a separate power source. Still, does that explain why none of the remaining 3 USB connections on my pc are detected?