Need help with AVG Free blocking websites

Hello Linda,

I regret for the inconvenience caused. Please this trial version of AVG Anivirus free from your computer control panel and install the latest version from this link: http://support.avg.com/SupportArticleView?urlname=Download-and-install-AVG-AntiVirus-Free. If you face any difficulties, feel free to contact us.

I need help and please understand I am old and do not understand technical terms on the computer.  I have used AVG Free for a long time without any problems.  I think by error I must have clicked on a free trial of something on AVG and now I constantly get pop ups that tell me my trial is ended.  That is not the big problem for some reason and I believe it is AVG I am blocked out of many web sites and even when I go to open a new tab the screen says connection cannot be made and then a black background screen comes on and says AVG blocked what is considered a unsafe site.
 
I need to be able to get my desktop computer that I use Mozilla back to what it was and to get rid of the constant pop ups that tell me my free trial has expired.
 
I would appreciate if anyone could help me, be patient and understand I know very little about terms in computer language.
Thank you
 

Hello Linda,

I regret for the inconvenience caused. Please this trial version of AVG Anivirus free from your computer control panel and install the latest version from this link: http://support.avg.com/SupportArticleView?urlname=Download-and-install-AVG-AntiVirus-Free. If you face any difficulties, feel free to contact us.