How to connect to Xbox Live through Laptop?

I've done so much research online and I've gone to my network settings and there are 3 icons. They say my xbox is connected to my PC. Then I keep getting this error message on my Xbox saying that my MTU setting needs to be changed to at least 1364. I'm using my latop as a router and I need help figuring out this MTU setting change. Searching online it seems like it requires way to many steps and programming for me to comprehend. Does anyone have a simpler solution? Thanks.