Firefox not working after AVG AntiVirus update

Maureen,

I appreciate your efforts.

I couldn't see the screenshot which you have attached. Please reattach the error message to check and assist further. 

In future please refrain from carrying out multiple topic postings on the same subject! You won't obtain an answer to your query any faster!. Also please try to keep the whole conversation in one question/thread to speed up any resolution. 

Maureen,

I appreciate your efforts.

I couldn't see the screenshot which you have attached. Please reattach the error message to check and assist further. 

In future please refrain from carrying out multiple topic postings on the same subject! You won't obtain an answer to your query any faster!. Also please try to keep the whole conversation in one question/thread to speed up any resolution. 

Maureen, 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