I'm sorry I didn't notice I'd created a new thread on the wrong forum. Anyway thank you so much for the replies. you've been so helpful I will try again with your link.

dzięki.

What could that mean ?

No I'm not. I got the game from internet. Fortunately, I managed to run it on windows 8.1 but when it comes to belzebub the problem arises. Is this really does matter that my version is a pirate? We live in 2015 how the heck I get original diablo 1 CD ?

Hi, can anyone tell me what's wrong here? I meet all requirements but I cannot run the game. Every time I try to run it, this window does appear.

Please be of assistance.