GNU GRUB

Pc was working fine with only Ubuntu. Entered BIOS on Asrock B450 gaming K4 and enabled the ultra fast boot. Now, when I start my pc, I'm faced with a gnu grub command line. Additionally, my keyboard LEDS are working but the keyboard will not do anything. What should I do? (Latest version of...

I have a Sony SRS-X2 but it won't link up with my Windows 7 PC. http://www.sony.com.au/product/srs-x2 When I first plugged my Bluetooth dongle in, it gave me an error that there was no Bluetooth Peripheral Device driver. I couldn't install it even in Device manager. It looked like this: and...