Everything was fine last night. shut down the computer (not something I normally do, but was in windows and about to go to bed). Wake up this morning, launch OSX and my internet does not work. System Preferences said it was unplugged. After trying different cables, ports on router, etc. I restarted in windows to see if it worked fine. Windows 7 has no issues and ethernet works perfectly fine there. Back in OSX I tried removing the ethernet interface from network preferences, but now it is not there to add again. In system information under ethernet it says there are no ethernet cards available. Any thoughts or a solution to this?