I have an older HP Media center PC from like 2006, it runs pretty good with Windows7 Home Premium, but I wanted to try Ubuntu Linux 12.4LTS on my machine. I installed the Ubuntu OS while in Windows 7, which installed fine. My problem was when I restarted my computer and booted into Linux/Ubuntu the OS would start to scramble or get lines on the screen which indicated to me a graphics issue. I tried to get to the Ubuntu software center to install the drivers but they are not there and the OS graphics seems to now freeze up and scramble before and after logging in. I downloaded the compatible Ubuntu drivers from Nvidia for my graphics card already, but I wanted to know if their was a way to install the drivers off a USB flash drive using the Ubuntu terminal or safe mode before booting into the Ubuntu OS?