> Always show file extensions; Use classic context (right-click) menu; Show End task command in the taskbar; Hide search box; Do not show Bing results when searching; Enable long paths; Prevent Windows Update from rebooting your computer; ...

I'd definitely love a .reg file generator website like this one, to apply some of these settings after the fact!

Check WinAero tweaker. I don't remember it creating a .reg file but it can export & import the tweaks you've applied.