I was having a problem with not being able to use my mouse or keyboard when in Safe Mode. Looking into it I discovered that two of the ASMedia USB3.0 eXtensible Host Controllers said they needed drivers updated, but they both refused to accept any driver. (These were already in when I got the computer a year or so ago.) The suggestion after that was to simply uninstall them, restart, and that Windows would find and fix them. After restart they now show in Other Devices as Unknown Device. If I select properties their location is "on ASMedia USB3.0 eXtensible Host Controller". The board is and ASUS P8Z77-V Pro. Any ideas or suggestions? p.s. Not sure if this is realted to the USB 3.0 bus problems that I read about from earlier Windows updates.