To deactivate this feature, you need to follow the next steps: Menu-> Settings-> Language and Input-> Deactivate the Spell Checker
In order to view the recently used apps, press the square icon until the tabs with the recently started apps appear. In order to shut them down, you need to slide left or right (up or down, according to the position of the tablet, horizontal or vertical).
Press and hold the power key for 10 seconds. The tablet will turn off. Restart it by pressing the power button for 5 seconds.
Go to Search-> write the name of the app.
Access File Explorer-> This PC-> Downloads
Two options are available: first is a program from Play Store, the second is Settings-> Privacy