hello...in the device manager the Universal serial bus (usb) controller appears with an exclametion mark..it means unknown device right?i know it needs driver...my mobo is gigabyte f2a88xm-hd3 and i went to gigabyte's website and i downloaded a file that was supposed to include (raid,usb controller,and chipset driver)..but when i extracted the file i was lost and i cant find the usb controller driver...;/...i am really complicated now.can you help me find the driver for the usb becuase i have some problems with some usb devices..my pc wont recognise the..for example my iphone sudently now isnt recognised by my pc . it wont appear in my computer.only on itunes.can someone help me fix those problems with my usb ? ;/