Hi, I have installed kali linux 2.0 ( 64Bit ) directly to a Desktop hard disk. I was updating kali 2.0 to rolling release, screen got locked during update & when i try to enter valid username/password it didn't work, i clicked try another user by mistake all of sudden screen goes blank & i get a non gui log in. is there any way to fix this ? i have important files of various virtual machines inside at least if i can access GUI i cant copy all contents to external hard drive & make a fresh install, i tried to copy through command line but it was friendly either, kindly suggest me fix.