Can access internet, but unable to download, connect to origin or Blizzard Launcher.

Yesterday I bought a Netgear D6300 and setup my network from scratch again. My network: NTU -> Netgear Router -> 16 port TP-link Switch -> Computer 1 and 2.

After I set up the network, my computer stopped being able to connect to Origin, the Blizzard Launcher, and could not retrieve email through Windows Live Mail. In addition, I attempted to download Adobe Flash, and it hung at "Retrieving Download" and closed after timing out.

The odd thing is that my other PC (through the 16 switch too) works with all of these things completely fine. Every other device connected to the network works completely fine but this one.

It is a brand new PC, (only built last week), running an onboard Killer e2200 Ethernet adapter from a MSI-H97-Gaming-3 mobo. I have attempted several things to resolve the issue, including setting the PC as the DMZ, but nothing has worked so far.
Unsuccessful Attempts:
- Set as DMZ
- Disable Windows Firewall
- ipconfig /release -> /renew -> /flushdns
- winsock reset
- no proxies in IE. (Also reset IE to factory default)
- Resetting NTU and Router
- Uninstalling and reinstalling the Network adapter driver