If you want to know how to turn off pop up blocker on Avast, you can follow the step given below:
1. After the restart once you are back at your desktop, open MBAM once more.
2. Click on the History tab.
3. Double click on the Scan Log which shows the Date and time of the scan just performed.
4. Click Copy to Clipboard.
5. Paste the contents of the clipboard into your reply.
Hopefully above steps will help you to fix the issue if not you can also follow our blog to see more on stop avast notifications.