MERCUSYS TECHNOLOGIES CO. Realtek 8821BU Wireless LAN 802.11ac USB NIC how to download and install the driver

Realtek 8821BU Wireless LAN 802.11ac USB NIC is a Network Adapters hardware device. This Windows driver was developed by MERCUSYS TECHNOLOGIES CO.. USB/VID_0BDA&PID_B82B is the matching hardware id of this device.

1. MERCUSYS TECHNOLOGIES CO. Realtek 8821BU Wireless LAN 802.11ac USB NIC - install the driver manually

1. Download the setup file for MERCUSYS TECHNOLOGIES CO. Realtek 8821BU Wireless LAN 802.11ac USB NIC driver from the link below. This is the download link for the driver version 1027.4.1120.2014 dated 2015-02-16.
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3. Run the driver setup file from a Windows account with the highest privileges (rights). If your UAC (User Access Control) is running then you will have to accept of the driver and run the setup with administrative rights.
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5. Go through the driver installation wizard, which should be pretty straightforward. The driver installation wizard will analyze your PC for compatible devices and will install the driver.
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7. Restart your computer and enjoy the new driver, as you can see it was quite smple.
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This driver is digitally signed by the manufacturer.
File size of the driver: 1755297 bytes (1.67 MB)
This driver received an average rating of 4.9 stars out of 10254 votes.
This driver was released for the following versions of Windows:

• This driver works on Windows 7 64 bits
• This driver works on Windows 8 64 bits
• This driver works on Windows 8.1 64 bits
• This driver works on Windows 10 64 bits
• This driver works on Windows 11 64 bits

2. Installing the MERCUSYS TECHNOLOGIES CO. Realtek 8821BU Wireless LAN 802.11ac USB NIC driver using DriverMax: the easy way

The most important advantage of using DriverMax is that it will setup the driver for you in just a few seconds and it will keep each driver up to date, not just this one. How can you install a driver with DriverMax? Let's take a look!

1. Open DriverMax and press on the yellow button named ~SCAN FOR DRIVER UPDATES NOW~. Wait for DriverMax to analyze each driver on your computer.
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3. Take a look at the list of detected driver updates. Search the list until you locate the MERCUSYS TECHNOLOGIES CO. Realtek 8821BU Wireless LAN 802.11ac USB NIC driver. Click the Update button.
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5. Enjoy using the updated driver! :)
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