On my Windows 7 Ultimate SP1 machine, the system tray network icon is showing with a big red X over it, even though all the network adapters and wireless dongles are working perfectly.
For appearance's sake I've hidden the icon, but I haven't figured out the root cause yet.
I believe it started when I was trying to install a Bluetooth USB dongle. I've removed all those drivers. On a side note, I also have issues with Windows 7 Resource Monitor: it will start but it won't show any data or statistics.
I've tried to reset the tray icon cache but this had no effect. Any ideas?