NetFlix and Youtube videos not playing on Windows 8.1?

[Now or Never]

I'm using a Windows 8.1 desktop computer (less than two months old) and I'm having trouble with videos. When I try to use Netflix on Chrome the video only loads to 20%, then I get Error Code N8202. If I try to play a video on YouTube that's more than a couple minutes long it fails to load. Some videos and GIFs fail to load or are really slow to load on other websites too.

On IE, Netflix stops loading at 24% and I get Error code H7031-1105.

Videos and Netflix worked perfectly the first month I had my computer. But suddenly one day, it just stopped working. I hadn't changed anything. It has been about 3 weeks now, and I've tried everything I can, but can't get Netflix and YouTube to work properly.

The problem is not with my account because it works fine on my Windows 8.1 RT tablet.

I've tried fixing MS Sliverlight, but that hasn't helped.

PLEASE HELP ME
Netflix does not work on Incognito mode.