Multiple Games And Programs That Connect To Servers Freeze?

Ive been having this problem for many months now. It started with a game called Arma3. At the time i thought it was the game that was the issue but i soon found out it was my PC.

for the rest of this thread when i say a program "freezes" what i mean is:

-The program first freezes then in the task manager the program slowly drops down to 0% CPU usage

-Sometimes the memory usage also goes down by a little bit.

-While in the frozen phase it either stays at 0% CPU usage or goes up and down between 0% and 1%.

-The length of this frozen phase varies a bit from program to program but its roughly between 5-10 minutes

The problem is games that have multiplayer crash as soon as i try to access the multiplayer. for example when i click multiplayer on the menu(in Arma3) it freezes for about 5 minutes. it then unfreezes and returns to normal loaded and the server list comes up and i can connect to a server, at which point the problem occurs again but for a shorter amount of time.

Some other Games/Programs that this happens to are:

-Battlefield 3

-Battlefield Hardline

-XPlane Flight Simulator

-War Thunder(Launcher, i cant even get into the game)

-Men Of War: Assault Squad

-Some Downloaders/Installers(when using ftp, i think)

-SkyDrive

Networking Games/Programs that it doesnt happen to are:

-Internet Browsers(Chrome,IE)

-Minecraft

-Teamspeak 3

-Visual Studio

-Most Downloaders/Installers

This problem only occurs on my PC and i have two other people in my house that have the same installation of windows 8 and are on the same network, who have never had this problem. I know the easy solution would be to reinstall windows but i dont want to have to do that and i have a problem with the windows key i bought and i wouldn't be able to activate it again(legally).