Question Can you tell me why my USB keyboard & mouse cannot work when trying to install Windows 7? My motherboard is C7Z170-SQ, please advise. Answer Since, Z170 chipset and BIOS have no support for USB 2.0 Enhanced Host Controller (EHCI) mode by default. But, our BIOS implement the workaround for it. Please follow the instruction below, then should be no problem to get USB KB/MOUSE to work. a. Make sure the BIOS build date is later than 2015/09/10. b. Enable this option under BIOS. Path: USB Settings >> Install Windows 7 USB support >> Enabled Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) V M F L FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 21523 BIOS: - BIOS Setting 09/11/15     Print Answer