Mac Scanner freezes after 99%

Hello Michael,

Thank  you for providing the details. Before escalating the issue, We request you to try removing the AVG program, reinstalling it and check if that works. Here is the link: https://support.avg.com/SupportArticleView?l=en&urlName=How-to-uninstall-AVG-AntiVirus-for-Mac

Please follow the instructions from the above link and contact us if the scan is running fine.

Thank you.

Hello Michael,
We regret to hear about the inconvenience caused. Could you please tell us the version of your MacBook OS? Also let us know the AVG version you are using in your computer, is it a paid or free version?
Share us the screenshot of the AVG scan window which stuck at 99% and also the Qurantine, it would help us to check and resolve the issue.
(To take a screenshot in MAC, please follow the below instructions : 1. To capture the entire screen, press Command-Shift-3. The screen shot will be automatically saved as a PNG file on your desktop with the filename starting with “Picture” followed by a number, example Picture 1, Picture 2, and so on.
2. To copy the entire screen, press Command-Control-Shift-3. The screen shot will be placed on your clipboard for you to paste into another program like PowerPoint, Word, Photoshop, etc.)
Thank you

Hi, the Mac Scanner found a threat and freezes after scanning 99%. The threat is not in the quarantine after restarting the computer.
I did that 5 times and always the same. Should I change to another program instead AVG?
Thanks for your help.

Michael, For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru