Where can I download Powerpoint for FREE !?

I have a powerpoint project due at 9pm tonight !!!! and I havent even started it , i juss realized I dont have powerpoint on my laptop soo I need help finding a website where I cann download powerpoint for free!! very detailed informatioin would help am not computer friendly at all, no websites that might give my laptop some sort of virus either please !! thanks sooo much for your help(: