Hi, I've run into a few programs on my new 27" iMac. This is my first mac so I'm a little unsure about this so hopefully you guys can help me. So I bought a genuine copy of windows 7, and got the black screen upon installation. I did the DEL C:\windows\system32\drivers\ati*.sys and it fixed it and installed it. I started playing with the resolutions on Windows 7 and accidently deleted my ATI graphics drivers. I went and installed it off the website but it didnt seem to help anything. (I may have downloaded the wrong one) I started getting really confused and deleted the partition and planned on just remaking a new one and hoping it would fix everything, but then when i got to the part in the installation when I had to do the DEL C:\windows\system32\drivers\ati*.sys it said that the file couldnt be found.... So im really stumped on what to do now.. HELP PLEASE. The graphics card is a ATI RADEON HD 4670.