Question I am having issues of a required CD/DVD drive device driver missing when I installed Windows 7 or Windows Server 2008 R2 on X11SSL-F (X11 motherboards). Can you please advise? Answer Since Intel removed EHCI controller on Sky lake platform, and Windows 7 and Windows server 2008 R2 doesn’t have native xHCI controller driver support. These result in Any USB devices will not work in Windows installation process. For now, the best workaround we recommend to use SATA DVD rom to install both of the OS and the SMC CD drivers for X11. Please refer to Intel for details: http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/ehci-removal-6th-gen-core-pch-technical-paper.pdf 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) D G Y F FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 22136 Operating Systems: - Windows 2008 - Windows 7 Peripherals: - USB (Universal Serial Bus) Ports 12/11/15     Print Answer