Your installation of Windows is that by any chance the installation that came with computer? Or is it a Windows that you have upgraded from a previous version (and perhaps that was upgraded from yet another previous version)?

I never have these slow downs that I read others have. I always do a clean install from a USB stick (including deleting recovery partitions). I do this like once a year or 1 1/2 years when something is being released that is either a new version or what is we used to call a service packs.

Windows sucks at upgrading. There is always something strange going on after upgrading. Things that not happens after a clean install.

If it is looong time since you have performed a clean install, I recommend you to consider doing that.