Hey i am new to this website but i will get to the point. i have a problem with my computer. when ever i turn on the computer it displays a black screen that says "operating system not found". i read most of your post and most of you say that i need to put a windows xp cd and use it to restore. The problem is when i put the cd in the tray and run it. i press enter but it doesnt do anything. i even tried to restart the computer but the same message keeps on showing up. Please help me!