Most platforms use 64-bit browsers by default when you're using a 64-bit operating system. 64-bit web browsers tend to be faster and more secure thanks to the additional security features available. Unfortunately, if you're running Windows, you may not get the 64-bit version of your browser automatically. To make the move, you first need to ensure that you're running a 64-bit version of Windows. You also need to make sure that you don't rely on any old browser plugins that are only available in 32-bit. After that, you'll just need to download and install the 64-bit version of whatever browser you use.