Hi guys

Been using Ubuntu on my new Packard Bell OneTwo computer. Anyway I noticed after installing Ubuntu I could no longer boot other mediums, pretty much anything, my bios does support usb and disc booting, so I downloaded the boot repair application and now my whole computer just hangs at the bios.(its a uefi mobo) and doesn't even boot the hard drive now, and it doesn't even load the settings when I press the delete key. So my new computer is pretty much bricked I've taken out the battery for about 30 mins but nothing has changed.

Help anyone? I'd be really grateful.