Laptop cant run game?

I have acer aspire laptop with1gb graphics card ,intel core i5,3gb ram.The problem is that whenever iam trying to install any good game(>2 gb) it installs properly till the end but as i launch the game an error message comes in all the games saying"please insert the correct dvd/cd rom press ok and restart the application but i had installed them using correct serial codes.The problem does not occur if the same game setup is installed in other laptop and the game shows no error in other computer .please help me in this regard as due to this i cant play my favourite games.