My Ethernet is working fine except for a small section of it, the: Microsoft Network Adapter Multiplexor Protocol. There's still more.... inside of the multiplexor is the main aspect that doesn't work on my laptop, the Reliable Multicast Protocol. I'd like to know how i can re-install that back into my computer. 

  I own a Sony Vaio E Series version: SVE11125CXW

Hi,

You can try this article:

Restore Default Startup Type for Microsoft Network Adapter Multiplexor Protocol

http://batcmd.com/windows/8/services/ndisimplatform/

Hope that helps.