Just saying, but tweaking stuff via regedit is a surefire way to get your Windows install corrupted sooner or later.

dism, sfc… and disabling the preview update channel, are your friends to have a stable Windows install.

If you don’t want Bing results in your search, then use something like Everything to search for files. It’s faster, and will only show you files, all of them.

The widgets you can disable, and with Powertoys even bypass the start menu completely.