There are a few options. You could do a clean install of Windows, you could go through manually and uninstall everything manually, or you could use something like PC Decrapifier. The easiest would be option three, but they all work.
From the PC Decrapifier website:
It's a free tool for you to use that helps remove programs, unnecessary startup items and icons that can slow down your PC. It takes you step by step, giving you recommendations on what to remove, many of which can be removed unattended.