One usb port saying unknown device.
What's plugged into it?
SOURCE: USB 2.0 Host Controller on Windows 2000 Server (Emachine 5260)
raycrean, Windows 2000 service pack includes drivers for USB 2.0.
http://support.microsoft.com/kb/819332
How do you know its not operating like 2.0?
SOURCE: USB not decting plug n play devices
I would check the bios settings to make sure the motherboard settings relating to PnP are correct. Try playing around with those bios settings and see what works for you. Also try different usb ports, i have the same problems sometimes with certain ports on my desktop computer, try all of them at the front or the back of the computer. I would check the Compaq Presario website for drivers not AMD, installing new ones is a good idea just to make sure its not a driver issue.
SOURCE: usb 2.0 ports not working on my emachines T3504
You may need to uninstall your current usb's and let Windows redetect them.
click on START, SETTINGS, CONTROL PANEL, SYSTEM. Click on tab HARDWARE, click on DEVICE MANAGER. Scroll down to UNIVERSAL SERIAL BUS CONTROLLER. Delete everything there. Click on ACTION, SCAN FOR HARDWARE CHANGES. It should redetect and you should be good.
SOURCE: All USB ports on my emachines T6542 do not work
try to see the BIOS SET UP if the USB port are in enbled status..
if its not,, enabled them...
and see the connection of the USB port into your motherboard if it connect properly..
SOURCE: flash disk comes up as unknown devices
Try to download some new USB drivers, or update your old one. That may fix your problem.
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