Why is my Laptop Not Connecting to the internet?

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Okay...around three or four months ago we switched from INSIGHT internet to Time Warner internet and since then my laptop has been acting like shit with the internet. My laptop can connect to the WIFI with no problem and I've checked the router when it's on and all the correct lights are flashing.

All I can do with my internet is get to google, search for one thing then it says I have no access to internet. I try to troubleshoot it and that says nothing is wrong. I go into CMD and type in IPCONFIG and it says all this stuff about media disconnection on everything. I check the Lan in Connections and nothings checked on, and I double checked that.

And I'm the only one in the house that has this problems. I can go to my school campus and it has NO PROBLEM working and its the same damn internet company. What's wrong with my laptop!!!!

Please help me!!!