If it were me...
1. I'd hard reboot a couple of times and see what happens.
2. you mentioned your nvidia network - was that working before? The update may have turned it on, or changed something in it that's clashing with your wireless kit.
3 - somehow you've turned off the radio on your device. Have you got a function & number key combo that will turn it back on? Do this and leave it for a bit to see what happens.
4 - Possibly you got a driver update via Windows Update which has banjaxed your setup for some reason. Try rolling back the last update - and then selecting custom updates in windows update and don't pick any networky ones.
Hope this helps.
Sparks
------------------------------------------
Wireless ADSL Routers - latest models all manufacturers
------------------------------------------