To open the Settings screen, click on the "Settings” symbol located in the upper-right corner of Avast's window. To access the audio options, go to the "Sounds” category in the general panel. To silence Avast completely, you can disable the Play Avast Sounds feature. Here you can also find the solution to How to make Avast stop popping up.
The message "Near Empty [Color]" indicates that a certain color(s) of ink is running low. You must replace the near-empty ink cartridge(s) to clear the "Near Empty" notice from the display. If you don't want to replace the cartridge until it's completely empty, the machine will display "Near Empty" on the LCD. The cartridge does not need to be changed until the notice "Ink Empty" shows. If you need to replace an almost empty cartridge, follow the steps that are given here why my Brother printer is offline?
How to turn off notification from Microsoft application?
You can stop the notifications by following the steps
If you are looking notification messages are "Renew your subscription" or "Subscription expired"
Renew your subscription to Microsoft:
If Renew your subscription appears in the yellow warning bars, click Buy to renew your subscription online.
You can renew your Office online by selecting Buy to Reactivate Office Online if the Subscription expires in the yellow warning bars. Enter Key if you purchased a Microsoft product key that is not in use from a retailer.
Close all Office applications after you have renewed your subscription. This will remove the renewal message. For assistance renewing your subscription, visit Microsoft Office Subscription Expired.