If the Chromebook does not seem to be working properly, performing a Power Wash may clear up issues. Power Wash resets the Chromebook to factory settings.

When you reset your Chromebook to factory settings, all information on your hard drive, including the files in the “downloads” folder, will be erased. 

This video will show you how to perform the steps:  https://youtu.be/tl5AQUW0OX8

Reset with shortcut keys
1. Sign out of your Chromebook.    
2. Press Ctrl + Alt + Shift + R simultaneously.   
3. Click ‘Restart’ to restart your Chromebook.
4. Click ‘Reset’ in the box that appears.    
5. Log in with your Google Account.    
6. Follow the instructions on the screen.    
7. Your Chromebook is now reset to its factory settings.