after installing i get message agds .ece has stopped working and comes up as a threat how do i deal with this as wanted to play this game again so i can remember the story before i play black mirror 2

Have you tried turning off your anti-virus?

What operating system? (What version of Windows?)
The Dreamcatcher version of Black Mirror shipped with an old version of StarForce copy "protection" that won't work at all on Vista and Windows 7. Unless you have XP or earlier, you'll need the Black Mirror NoCD to replace files in the Black Mirror install.

If you have XP but also have an antivirus running, the antivirus could be objecting to the StarForce.