How to fix Skype Internet Connection?

So it's been a while now since I've had Skype and it's been working like a charm. However, on May of last year, my dad has decided to install an anti virus program on our computer, McAFee. Ever since then, my computer disconnects at random points when I'm talking to someone on Skype and have the Internet open at the same time. Everyone I talk to through Skype know I can't open my internet when Skype is on because I disconnect. It's almost been a year now and I've gotten used to the disconnections but I'm starting to feel like I need to do something about it. I have turned off all of the settings on McAFee to see if my internet will improve and it has, but I still disconnect when Skype and the Internet are open. Also, I think it's good to know I do not just disconnect when my internet is open, but also when games are open such as World of Warcraft, Minecraft, H1Z1, Counter Strike: Global Offensive, iTunes (for music), etc. And it only happens when I'm talking to someone through Skype. Not when it's open, just when I'm talking to someone in a call. I don't have a clue how to fix it considering I have tried many methods that haven't worked so I have learned to deal with it.