Unity project doesn't work properly after export?

I made a game with a colleague and when it was finished today we exported it. On my PC everything worked and on my laptop, when he started it, the Lightning was completely bugged and the game had wrong shaders etc. Does anyone know what might be the cause? Because everything worked on his 2 laptop, is it maybe because he had the same project on Unity?

Better go with the question in a computer / game forum!

Okay but I thought that maybe a few people could help me here