Hello everyone i am new here. I have question to ask. I just bought a amd phenom ii x4 955 and a asus m4a88tm le motherboard . After that i formated my hdd and installed win 7 ultimate and amd motherboard drivers. Now when i connect a usb device it shows Unknown usb device (except my mouse and keyboard) . Please help me.
More aboutunknown device error
Try to run the Windows update again, and check the asus web for fresh drivers, make sure u have them all installed.