I've had BT4 pre final Live install on a usbstick and using it for a some time with no problems but then i decided to do a hardrive install, the installation worked fine until i rebooted and tried to login. My keyboard didn't work and i have tried to move it to every usb port and boot without keyboard and mouse and plugged in them at the login prompt without sucess. I have no other keyboard avalible but it works perfect when i boot on live usb stick and in ubuntu. Suggestions?