Won't let me play without the disk?

[Eggy1357]

I'm trying to play Prototype but whenever I try to load the game it tells me to insert the disk. What do I do? Also it's the first time I've tried this so I'm proberly making a mistake some where.

[Blazkowicz]

Which disk you inserted? Original or an image?
If an image, how it got created?

[Eggy1357]

By the way I don't have the disk, I used a torrrent.