After having a few IRQ problems with my computer, I found that both my graphics card and video card had lost all their drivers. I re-installed the soundcard and downloaded the newest Nvidia drivers for my card (i couldnt find the original intall CD). All ok until I went to play a video and no matter what media player I used it comes up in only 16 colours and really bright despite the card being set at 32bit. I found the original cd and installed the drivers. Now, after the windows screen, everything goes black - the operating system is still running in the background, and if I type my password in I can hear everything start up but I cant see it. Any help?