Before proceeding, you need to undo the bridge first.
On the laptop.
Go to the Network Connections screen → Right click on the Wireless Network Adapter → Select Properties → Select Sharing Tab → Check both Boxes → Click on Settings → Check the Options needed (HTTP, HTTPS, FTP, etc...) Click "OK" until you are back to the Network Connection screen.
Plug in the Ethernet cable into both systems, wait about 90 seconds and see if the Win7 computer has internet. If not, restart the Win7 computer and check again.