AVG antivirus not removing item from quarantine

Sky, Mac screenshot (https://support.apple.com/en-us/HT201361). 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

Hi,

I inserted an old flash drive into my macbook and AVG found a malicious file and moved it to quarantine. I tried to remove it forever but it wouldn't let me. It said I needed permission to remove it and it didn't work. How can I remove it please? My AVG is updated to the latest version and I am running OX X Yosemite. User-added image

@Alan Binch: Thank you.

Thank you for the efforts.
To be sure, have you tried clicking on "'Image' [mountain symbol]" on the answer field to attach the image?
If yes, share the image through the email that I have sent you now as I am not able to view the image shared in this link: https://imgur.com/a/KMVNrGc .
If the email is not found in inbox do check in spam and junk folders.
It is not necessary to worry about the infection as it was moved to quarantine by AVG.
User-added image

I am trying to upload my picture from my desktop but it is not working! It won't insert. I am adding a link from imgur and that wont insert properly either. Don't know what's the issue. Here is the link again: https://imgur.com/a/KMVNrGc

Will my laptop be okay? Apparently it was a worm malware and I am worried. Will my laptop and network be affected now? Or is it all okay since it is in quarantine? 
Sky, Mac screenshot (https://support.apple.com/en-us/HT201361). 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