I have a lenovo z570, and i installed ubuntu 12.04 alongside with my windows 7. Recently all my games ive been playing, stop responding due to a AppCrash. I searched it on google and they said it had something to do with ubuntu. So i deleted the partition. After restarting my laptop i get the: unknown filesystem grub rescue error. I tried using a windows cd to boot, but it cant. Please HELP!! If you got something please comment or send to [email protected] Thanx in advance