Hello, my first post, bear with me, I had to reformat and reload XP on my desktop a Dell Optiplex 260. Here is my problem, does it have to be the exact same disk as came with the PC, I have 3 disks and forgot which one it is, the key code is on the PC itself. The drivers won't load, cannot get an ethernet driver to load or any of the video or multimedia. Do I need to reformat on each try? I'm thinking maybe time for an upgrade with Windows 7, any help appreciated...thanks