my pc has usb ports at the back and 1 at the front, my usb port at the front of the pc no longer reads it still powers up but wont acknowledge a device. (i know this because my card reader light comes on but will not show cards slots as drive g,h etc..) when i plug the card reader in usb port at back it recognise it and same with my memory stick)
this problem started when i plugged in my usb convertor so i can use playstation joypad to play snes emulator. i have used this many times and never had problem.
but the other day when i plugged this in i got message "new device etc... not installed correctly)
since then the usb port has not been working properly (yet it can still power a device)
i looked in device manager under USB bus controller no problem there.
i did alittle research and turned off pc and unplugged power and this still has not fixed my problem.
In Device Manager expand the list of USB devices. Then you can RIGHT-click any of them and choose Uninstall.
You might try Uninstalling only the external USB devices like HDD's, etc, and the USB hub if you have one. Leave the internal USB devices that are part of your mobo alone for now. See if re-installing only the externally-connected devices solves your problem.