Nikon D3100 Problem with Photo color?

I just bought my nikon D3100 and well everything is fine on the camera. When I shot photos, the color are amazing even when I zoom. However, when I upload them on my pc… It's not what I was waiting for. It's less colorful and truly not the same as on the camera! Why? Am truly disappointed.

I would say it's your monitor. Have you calibrated it? If not I would suggest you do that.

For once I agree, the monitor is the most likely culprit. Visit a friend, see what it looks like on their computer.