Weird internet connectivity issues?

Ever since Time Warner changed my modem to some newer Ubee modem I have been experiencing weird connectivity issues at home.

Speed Tests show I get about 12mb/s but I will go on youtube and 30 seconds into a video it will start buffering (even though it shows more video loaded), or the browser will automatically refresh itself, or an advertisement will randomly start playing, or my display driver will crash and refresh the page. I don't understand how this happens, I can go anywhere else and youtube works flawlessly. I don't understand how the Wi-Fi at my house affects my display driver.

I also experience problems on Facebook video where a minute or two into a video the video will just stop.

Also on Minecraft I will get randomly disconnected.

I'm not sure if there's some setting I have to change to fix this or what. This is really weird.

Any help is appreciated.

You have infected your machine with spyware.