newly built computer internet

i built my computer week ago.. but i think my internet is messed up... my old computer which is way worse then my new one gets better connection in games for some reason... and my old computer DOESNT freeze sometimes on a game i play called runescape... also when i goto my control panel then my network connections.. it says i have 2 connections.. one that says "Local Area Connection" and another one that says "1394 Connection 3" .. and it says they are both connected.. and when i try repair the "Local Area Connection" it says "Windows could not finish repairing the problem because the following action cannot be completed: Clearing NetBT" ... and when i try to repair the "1394 Connection 3" it says "Windows could not finish repairing the problem because the following action cannot be completed: TCP/IP is not enabled for this connection. Cannot proceed." ... i have no idea what to do.. and i dont even think there should be 2 connections in "Networking Connections" ... also when i 1st built the comptuer i had trouble getting the internet to work.. i have no idea how i got it to work either.. on both the icons they have a little lock at the top right of the icons also.. but i think thats normal.. also when i couldnt get on the internet when i first built the computer.. it said it was connected.. but i still couldnt get online and it said it was running at 900.0 Mbps, which was strange.. can anyone help me?