Game build won't launch (Windows 7)

[Keinart]

Alright so this is probably the most weird bug I've seen in my life and I doubt it has an easy solution, but I would appreciate if people can at least give me ideas about what may be happening or what can I do to figure it out.

I've been doing some beta testing of my novel, and everything was going alright until a friend tried to play my game in his own computer. When trying to launch, nothing would happen, and three different processes for the game would appear at the same time. Pic related: http://i.imgur.com/nPJJjSy.png

Now, we have tried all kind of things, from updated direct X and Net network to some other stuff, but to no avail. Funny enough, if he uses renpy to build for example a windows version of The Question, it WILL WORK, and more funny enough, if he uses renpy itself to launch the game through the .ry file, it will work too.

He has Windows 7 just like me, and the game has worked until now to everyone who has tester but him, what makes me think it's probably a problem by his side, but I can't understand how some renpy games work for him, but mine won't.

I appreciate any ideas. Thanks.

[Keinart]

Alright so we finally figured it out what was going on. It was the anti-virus, avast.

We don't know exactly why or how, but avast made it impossible to launch the game. Don't know if this happens to more people or not but I guess is something to have in consideration.