the usb ports on my computer dont seem to know my camera ,printer, and other item are pluged into them. the sound cable on my computer is usb and it works with all the ports. really crazy need help bad.lol
You may be surpassing the power limit supplied by the USB Hub. Multiple Ports run off a single Hub.
Do a shut down. Unplug your USB devices. Startup. Plug your USB devices in, one at a time and see what happens.