Touch to touch mode does not work in Windows 8.1.
In the initial state, it seems there is a case that does not work in Windows 8.1.
Resolve to apply the Windows Update 2955164
If you can not apply the Windows Update, it can be avoided by applying a touch to mouse mode.
Touch to touch mode does not work in Windows 10 Anniversary Update.
It seems similar problem has occurred again in Windows 10 Anniversary Update.
2016/08/21 Currently, the information of the Windows Update fix is unknown.
2017/04/08 Fixed by Windows 10 Creatores Update!
It can be avoided by applying a touch to mouse mode.
Other way, it works by return to the previous build a Windows 10.
Show touch keyboard by 3 fingers touch not work in Windows 10 Anniversary Update.
It can be resolved by editing the registry.
Please be careful editing of the registry.
1. Press the Start button.
2. Run registry editor by typing "regedit".
3. Display the following location.
4. Select the "Edit" -> "New" -> "DWORD (32bit) value"
5. The name of value : "EnableDesktopModeAutoInvoke"
The data of value : 1
6. Restart Windows.
Or, there is no problem with the build of the previous Windows 10.