Trouble trying to get started with pygame

[originallmoney at gmail.com]

I tried what you suggested at the command prompt and (Despite being able to open Python from my start menu), it tells me Python isn't installed. 

I'm curious, and, I probably should have mentioned it earlier: I have Python on my D drive (Because it has more space). Is THAT why it says Python isn't installed? MUST I have it on the C drive?