so you guys are smart, i just re installed vista (yuck) and now my Ethernet port wont work, i booted it to lunix and that still sees the port,
Try running Device Manager (either use the search bar, or hit win+R and enter devmgmt.msc). Does your connection show up under 'Network adaptors'? And if not, is there anything under 'Other devices'? Either way, try right clicking on the device and selecting Update Driver Software.
Spoiler
(http://i.imgur.com/MWbXA.png)
(http://i.imgur.com/HpRDj.png)
If you still have your old windows install, select 'browse my computer' and find the location of your old windows directory (if you install Windows to the same hard drive, I think the previous Windows directory is moved to a hidden folder named Windows.old). That should find the drivers for you.
If you don't have your old windows install you'll need to select search automatically online, but that's very hit-or-miss. Sorry. :)