Screen mirroring Android to Windows 10: How to enable keyboard/mouse as input devices?

I'm using Android's Miracast system to project my Android screen to my Windows 10 computer. This is working fine (though I notice I have to reboot my computer sometimes to get it to show up as an available device to the phone).

However, once I connect, I get this mysterious/unhelpful message:

Touch Input is Turned off. To turn it on, go
Back to your PC, and select action center >
Connect > the check box

As I've searched around, it appears this message is causing others confusion too. I think there is a checkbox in the Action center > Connect menu when connecting to some other devices (like maybe another Windows 10 box?). But nothing shows up in the Connect area when this Android device is connected, so I can't figure out how to enable touch controls - there's no checkbox to click.

(Basically I want to use my mouse and keyboard on the computer to control the inputs on the Android phone.)

Ensure that the system service of Touch Keyboard and Handwriting Panel (or Tablet PC keyboard) is on. If that does not help, read on.

The famous checkbox that everyone talks about but can only rarely find is here:

A test done by a user named rajeshthampi in the post "Project to this pc" not available on Win 10 despite correct hardware shows that the checkbox is present when projecting from Windows to Windows, but not when projecting from Android to Windows.

The conclusion of the user was that this checkbox being available is dependent on the sender (Android) and not on the receiver (Windows).

I suggest therefore to avoid the standard built-in casting in Android and to use a third-party Android product.

One of the following free apps might do the job :

• ApowerMirror - Mirror&Control
• AirDroid: Remote access & File
• AirMirror: Remote control devices
• AirMore: File Transfer

In listing these apps, I'm judging purely by their descriptions, not having tested any of them.

There is an alternative to Miracast - Try MyPhoneExplorer by FJ Soft.

In phones with Android 5 (Lollipop) and newer versions, you can enable "Extras" > "Control Phone / Screen-Mirroring". This can be done via Wi-Fi, Bluetooth or USB after installing the companion app on the phone.

The feature gives you options to adjust zoom, type, gestures, etc.