mine craft wont start up

i tried to plug my video card in and tried it whith out it . it stil does not work... sometimes it says i need to reinstall minecraft my minecraft says i need to update drivers but i have no out of date drivers so i dont no what the problem is. the launcher comes on but i click on play and it bring me to a crash report it has been doing this for a long time i even got a new computer to play on but it does the same thing