Question for the 32-bit color depth.

Hey guys, I have a question for the 32-bit color depth, before I brought my PC to a repair shop, the windows minimize, maximize and close button looks like the picture 1, but after reformatting it, I re-installed my gfx card drivers, updated MSE, and updated Java (yesterday), and after restarting it, I noticed that the buttons looks like it came from the 16-bit color depth (picture 2), I want to change it like the picture 1, Nvidia color panels says I'm on 32-bit which is true. Also after downloading 500 Mb of updates, it's still like picture 2. Is there anyway that I can fix/change it? It makes me think that those buttons doesn't fit with the 32-bit color depth.

Problem, there's no "Aero Theme" in my PC, is there any way to download it? Or it's in the OS? Before reformatting my PC, there's an aero theme.

Thanks Brink, it's working fine now, I'll give you a rep. Question, will the effect still be in place even if I restart or shutdown my PC?

Edit: I'll give you the reputation later since it's saying "You must spread your reputation around before giving it to Brink again".