didnt suceed with sudo dpkg-reconfigure xserver -xorg but thank you all , im gonna try again and if i cant im just gonna delete that linux partition (60 gb) that is another issue because i used to do that with the windows xp cd ...that i dont have can i do it with the linux live cd?my plan is 2 delete that and install it again...

by the way i see no questions when i write that command on the prompt ...
NO VIDEOFORMAT SUPPORTED I CANT BOOT ON NORMAL MODE IN LINUX HELP!