Windows 10, when I searched from the Start Menu or search icon, only (dead) Settings or Control Panel results appear with a result of "could not find....". For example, if I type "index option" or "control panel", the search results pull up the "Setting" gui and and the links were dead & unresponsive. When I created a new test user account, it had the same problem. All my attempts failed until I stumbled on this: This fixed my problem: Go to (OR search for a folder named "INDEXED"): C:\Users\USER_NAME\AppData\Local\Packages\windows.immersivecontrolpanel_cw5n1h2txyewy\LocalState => Indexed Right-click the Indexed folder > Properties > Advanced > Check Allow files in this folder to have indexed in addition to file properties. Click Apply and Exit. In my case, it was unchecked, I checked it > applied > that fixed it for me. Even if it is checked I would uncheck > apply > recheck > and apply it again. It instantly worked as a robust search tool and I rebuilt the index file after trimming it (35,000 items from 179,000). Hope this help someone!
Maybe it was a folder: C:\Users\{USERNAME}\AppData\Local\Packages\windows.immersivecontrolpanel_cw5n1h2txyewy\LocalState => Indexed or simply %LocalAppData%\Packages\windows.immersivecontrolpanel_cw5n1h2txyewy\LocalState => Indexed
It is already checked, but sometimes Windows "forgots" it, then You must uncheck and then check again, as was said in first post. It's absolutely tru, this may happen sometimes.
You're correct, I failed to complete the path of \LocalState => Indexed. Thanks. Although once you get that deep you are going to find it!