I got my PC with 7 preinstalled so I don't have installation disks. I had installed Ubuntu but decided to uninstall so I formatted the partition and now learned that the mbr must be fixed after doing that. I can't boot so Idk what to do. I have recovery disks but Idk if those will work and I'm having trouble finding them. is there a bootable CD that I could make from another PC to fix the mbr? thank you!