The letter "B" next to your network icon typically represents a network-related status or feature. On Windows laptops, this icon sometimes indicates that the device is connected to a Bluetooth network or another wireless peripheral. However, some network management software, like VPN clients or specialized network tools, can add unique indicators to your network icon to reflect active network states, new updates, or even alerts.
The "X" in a circle next to a "Hidden Network" signifies a connection issue or an unsuccessful attempt to connect to that specific network. Hidden networks don’t broadcast their SSIDs, so they can appear differently and often require manual setup with the correct network name and password.
You can check your network and Bluetooth connections under Settings > Network & Internet (Windows) or equivalent settings if you’re using another OS. Disabling and re-enabling Bluetooth or Wi-Fi connections can help if the indicators persist without apparent reason.