Hope your week is going fine.. This problem of not able to see the letters when typing is unusual and weird.
  
   There should be a problem with the allowance of computer's hardware and OS. This option should be in the 
    3 dots menu -> Settings -> General -> Performance -> Check if the "use recommended performance settings" is 
    clicked/ticked, and if not it should be a problem with the browsing settings (similar to how you accessed 
    "Performance" section in Settings where you can enable some keyboard-and-media options that you can 
     clearly see in the "Browsing" section.

Hey Mr. saldar644, Hope your week is going fine.. This problem of not able to see the letters when typing is unusual and weird. There should be a problem with the allowance of computer's hardware and OS. This option should be in the 3 dots menu -> Settings -> General -> Performance -> Check if the "use recommended performance settings" is clicked/ticked, and if not it should be a problem with the browsing settings (similar to how you accessed "Performance" section in Settings where you can enable some keyboard-and-media options that you can clearly see in the "Browsing" section. Let me know if you need more help, Tharak.