One year on Linux, two distros, a few tears, four desktop environments, and zero regrets about leaving Windows.
The January Patch Tuesday updates for Windows refresh the expiring certificates for Secure Boot, which protects your computer against bootkit malware.
If you're looking to finally test the waters of Linux, here's a distribution that has everything you need to get started, with everything you need and little complication.
A clean install isn't the best way to speed up your PC, either. You can simply delete apps, turn off startup programs, or ...