Can't play certain games like Candy Crush Soda Saga

I can't play certain games like Candy Crush Soda Saga and games in that line on my computer/laptop.They are telling me That I need to update my drivers and graphic card and WebGL is telling me it needs to be enabled and i don't know how to do that and if I try I might lose everything that I have right now and I don't want to do that because I cannot get everything back that is on it I'll lose it all.help!