When I download it...Powerpoint comes up and says its 'corrupt'...help?

[ClearrBlue]

Okay, downloaded it, clicked....powerpoint jumped up, tried to download it, then a small window popped up and said "This file may have a few missing files and may be corrupted." and that kind of ****...

Can someone please tell me how I will be able to fix this so I can play?

I'm confused about it...:confused: