Strange Problem with Mouse Click

Ant Z quote "a few days ago upgraded to AVG Internet Security (AVG Version 2014.0.4794)"…
Ant, Have a look @ this article (https://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG). Currently the latest version is actually 2015.0.5645. Also have a look @ this article (https://support.avg.com/SupportArticleView?urlname=How-to-upgrade-AVG-8-5-9-0-2011-or-2012-to-the-latest-version).
AVG Guru

Hi,

I have used AVG for a few years now but a few days ago upgraded to AVG Internet Security (AVG Version 2014.0.4794)

Installed are:
avg advisor, anti-rootkit, anti-spyware, anti-virus, identity protection, pc analyzer, resident shield, surf shield, and email protection.

As soon as this upgrade/update finished, I noticed a problem with left clicking using the mouse. In most cases I now have to left-click twice, instead of once, and sometimes 3 times, to get it to work.

For a while I thought this was a problem with the mouse, checked it and drivers etc. Nothing made a difference.

Then I decided to disable AVG. As soon as I did, the mouse began working normally again and as soon as I enable it, the problem occurs again. I can replicate this every time.

Ant Z quote "a few days ago upgraded to AVG Internet Security (AVG Version 2014.0.4794)"…
Ant, Have a look @ this article (https://support.avg.com/SupportArticleView?urlname=How-to-repair-AVG). Currently the latest version is actually 2015.0.5645. Also have a look @ this article (https://support.avg.com/SupportArticleView?urlname=How-to-upgrade-AVG-8-5-9-0-2011-or-2012-to-the-latest-version).
AVG Guru