Can't delete quarantine files

Hello Edward,

I understand your concern.

Please send me the screenshot https://support.apple.com/en-us/HT201361 of the threat message and the version of Mac installed on your computer.

We will check the same and assist you further.

Hi, i can't delete the files in quarantine, has anyone ever encountered a problem like this?
I tried to delete it but could not
(Sorry we are unable to delete this file. Please check did you have permission to delete it and try again). I'm use AVG for Macbook
Thanks

Edward, 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

Hello Edward,

I understand your concern.

Please send me the screenshot https://support.apple.com/en-us/HT201361 of the threat message and the version of Mac installed on your computer.

We will check the same and assist you further.