Red X in System Tray - Caused By Incoming Connections
On Windows 7 32bit or b4bit clients, after creating an incoming connection, the system tray icon always displays a red x when no incoming connections are active. However, you can still access internet without problem.
See the following snapshot,
This issue happens since no incoming connections are active.
The only thing to do is delete incoming connection. When incoming connection is removed, this issue goes away.