We recently built my friends computer. We started with Windows 8.1 and that was fine until the keyboard and mouse stopped working. We tried other USB ports, disabling the XHCI in BIOS, and other things but nothing worked. We decided to clean format and switch back to Windows 7.
We're now using...
64-bit
bios
bsod
clean format
computer build
drivers
faultyparts
hardware issues
memory problems
software problems
system errors
system restore
technical support
troubleshooting
updates
usb devices
user experience
windows 7
windows 8.1