im new on ubuntu , i intalled it ( dual booted with windows 7) i was customizing it, but when i tried to run compiz it said that missing glx or something like that in the screen, i realized that the driver that i was not using wasnt the gefroce on so i went to nvidia downloaded the correct version for my graphic ( geforce gtm 525m) when y run the .run file it told me that i was using xserver and that i cant install this driver with the xserver installed. i search for information of how to remove or disable xserver i found one. in this web site --http://www.ubuntugeek.com/ubuntu-tiphow-to-removeinstall-and-reconfigure-xorg-without-reinstalling-ubuntu.html when i run the command , after that i tried to instal the geforce on, doesnt work so i remember windows that you must reboot after a driver unintallation or intallation so i reboot, them ubuntu doesnto load, it show the ubuntu whit the five dots like or 1-2 sec and them i get a black screen ( not the red-black of ubutntu ) so why i should do. i dont want to re install i dont have a cd and my usb is a little damaged so please if you could help me