Yesterday I installed ubuntu 13.04 on my pc. Previously there was two windows 7 installations. One on a HDD and another an SSD. I brought the pc from a friend and it came with one 2TB HDD. I removed an SSD I had in a laptop which I was using at the time and took it out and sold the laptop. I reformated the SSD and installed windows to the SSD.
This left me with two windows 7 installations and the pc would go to a dual boot dialog then boot the SSD.
Yesterday when I installed ubuntu I formatted the partition with the old windows installation on the HDD. After doing so I can't access windows. Also ubuntu is completely unusable. I think it may be a driver issue. Sometimes when it crashes it says something about a GPU Lock Up and nouveau drivers. I have a gtx 580. I know there is an alternative nVidia driver but I can't access the internet and I found some apt-get commands to get it that way. When I go to select wifi it crashes. When I go to open a drive it crashes and I also found a .run file which I can't copy to the pc because it gets 2/3 of the way and locks up.
I need help installing the nvidia driver as i'm pretty sure that's what's causing the issue there and then once i've done that can someone also point me to a guide where I can put Windows 7 into the GRUB menu?