Remove entry from Windows 10 Apps & Features

The location has changed to HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall for Windows 10

Another place for uninstall keys:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall

Software installed for a single user is here. Log in either as the specific user, or if not found there, run regedit as administrator and look again.

You can also try the old-school Control Panel; that helped me. Click "Start", type "Control Panel", and press Enter to bring up the old Control Panel app. Go to Programs > Programs and Features. Those pesky applications will likely be listed there too.

Click the problem application's entry, then "Uninstall" in the bar above the list. It will complain that the application is not found, maybe it was already removed. But the key is that the Control Panel also asks if you would like to remove it from the list. Click the "Yes"/"Remove" button in this dialog and (at least for me) the application disappears from the list.

When I went back to Settings > Apps & features, those applications were no longer listed. Seems Microsoft missed an important feature in the new Settings page.

Two other techniques that may uninstall Windows apps that have not been fully uninstalled are:

1. CCleaner: Lists Windows components and other applications that Windows' own Apps & Features does not (compare alongside one another to see what else CCleaner lists). The portable build that does not install will avoid adding further to the list of installed apps as it leaves no trace of use in the registry.
2. Microsoft's troubleshooter that fixes problems that block programs from being installed or removed.