"1) Connect ethernet cable to PC/Laptop and xbox console.
2) Open Network Connections
3) Right click Wireless Network Connection and select Properties.
4) Click the Sharing tab and make sure the top box is UNCHECKED!
5) When finished, repeat steps 3 and 4 for Local Area Connection. If there is no Sharing tab, "don't do anything on local area connection!!
"6) Highlight both Wireless Network Connection and Local Area Connection, right click, and Create Bridge. You should then notice your Wireless Network Connection drops down with the new Bridge Connection
7) The most important part now is to right click Local Area Connection and Add To Bridge."
THIS IS THE ONLY WAY.DO NOT GO TO COMMAND PROMPT,DO NOT MESS WITH IP ADRESS,AND DO NOT FIDDLE WITH ANYTHING EXCEPT WHAT IS EXPLAINED HERE.YOU CAN TRUST ME BECAUSE I HAD THE SAME PROBLEM AND THIS WAS THE ONLY SOLUTION.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
all credit (and many thanks) go to the original author.