Need help!!!

I just bought a 2007 grizz 450. It ran great for my friend who I bought it from. I got it home today and while it was in idle I hit my winch button and it killed the quad. Now it will not start all it does is crank. I have spark checked all fuses and they are good I have gas going to the carb. I don’t know what’s going on but I didn’t even have it for an hour and already having bad luck.