I bought Toshiba Satellite L305-5907 laptop that originally came with Vista.
However, I wanted to change to Seven and I did. Everything's fine except the fact that my built-in microphone doesn't work. Whenever I want to chat via Skype I have to plug-in my headset, which is kind of broken, so I tried to get the built-in thing to work again, but I couldn't. The weird thing is that when I installed Vista again, it worked fine.