Take the EP-1690 as an example.

Problem Description

During the use of the EP - 1690 USB network card, the Wi - Fi connection disappears while the Bluetooth function still works properly. This situation is likely caused by driver issues. You can try the following solutions.

Solution Steps

Step 1: Open the Device Manager
There are several ways to open the Device Manager:

· Method 1: Using the Win + X shortcut

· Press the Windows key and the X key simultaneously on your keyboard.

· In the pop - up menu, select "Device Manager".

· Method 2: Search in the Start menu

· Click on the Start button (usually located at the bottom - left corner of the screen).

· In the search box, type "Device Manager" and then select the "Device Manager" application from the search results.

Step 2: Confirm the Hardware Status of the Network Card
After opening the Device Manager, you can see that the Bluetooth is running normally, but the EP - 1690 Wi-Fi hardware (Realtek 8822BU Wireless LAN 802.11ac USB NIC) cannot be found in the "Network adapters" section.

Step 3: Delete the Bluetooth Driver of the EP - 1690
In the Bluetooth section of the Device Manager, delete the Bluetooth driver of this network card. Right - click on "Realtek Bluetooth Adapter" and select "Uninstall Device".

Check the box to "Delete the driver software for this device" and then click "Uninstall".

Step 4: Scan for Hardware Changes
After uninstalling the Bluetooth driver, click "Scan for hardware changes" in the upper window of the Device Manager to refresh the hardware status.

At this time,both the EP - 1690 Wi-Fi and Bluetooth hardware will appear and run normally.