As you probably have guessed, Opera is my preferred browser across all operating systems. I know they have a 64 bit version for Windows (as they do for Mac and Linux), but for whatever reason that particular version is tricky to locate.
Normally you can just hit their site and you will be directed to download the correct version for your system. Unfortunately the 32 bit version for Windows is what is presented.
If you would like to get the Windows 64 bit version (or any number of other different or older versions), try starting with this page. Once on that page you can follow a selection tree to get to the version you are after. For the Windows version you would first click Windows, then click the latest version number, and finally choose 64 bit from the “Architecture” drop-down menu and click the “Free Download for Windows” button.
That’s it. You can thank me later.