Why do I need this?
WampServer is a great web development environment but it's a bit outdated so if you want to work with latest mysql you need to do it manually.
Prerequirements
You need to have WampServer 2.5 or later (may work for older versions too), if you don't know how to install WampServer check my tutorial here.
Where to download?
You can download the latest mysql server from the official site. Based on your machine you will download the 32-bit or 64-bit, if you don't know which is for you download the 32-bit. Download the MSI installer and not the zip archive. If the latest version is 5.6.20 as your read this then you can download it directly from the below links (official links).