A4Tech Bloody B820R Keyboard Software for Windows

A4Tech A4Tech Bloody B820R Gaming optical keyboard driver

A4Tech Source reference

Windows 11 / 10 / 8.1 / 7

A4Tech Bloody B820R uses the official A4Tech keyboard software package for Windows. This page is written for users who want a clean local copy with version, size, checksum and source details visible before download.

A4Tech Bloody B820R driver overview

Install this package after a Windows reinstall, when hotkeys, wireless pairing, lighting profiles or keyboard customization tools are missing. The download is kept as a verified local library file while the source link points back to the official vendor support page.

When this keyboard driver helps

Windows detects the keyboard but special keys or software controls do not work.
The vendor keyboard utility is missing after a clean Windows installation.
You need a checked local installer with checksum and source information.

Supported Windows versions

Windows 11 / 10 / 8.1 / 7 (32-bit / 64-bit).

Before installing

Disconnect duplicate keyboard receivers if pairing fails.
Close older keyboard utilities before running setup.
Restart Windows if the installer updates HID services.

Driver file details

Version: Keyboard software installer
Release date: 2026-06-26
File type: EXE
Manufacturer: A4Tech

How we verify files

We compare the model, version, and operating system with manufacturer data.
When an official reference is available, we show the original source.
We keep checksums so the file can be verified after download.
We do not disguise third-party installers as drivers.

Installation guide

Download the file only from the trusted link on this page.
Check the file size and checksum when they are provided.
Run the file as administrator only if you trust the source.
Follow the installer steps and restart the PC if required.

Available downloads

Choose the package that matches your Windows version and installation needs.

Installation screenshots

Visual setup checkpoints before changing Windows driver settings.

/uploads/install-screens/keyboards-20260626/a4tech-bloody-b820r-keyboard-software/a4tech-bloody-b820r-keyboard-software-install-01.webp?v=1 | Step 01 | Keyboard software setup checkpoint | A4Tech Bloody B820R installation screenshot 01 /uploads/install-screens/keyboards-20260626/a4tech-bloody-b820r-keyboard-software/a4tech-bloody-b820r-keyboard-software-install-02.webp?v=1 | Step 02 | Keyboard software setup checkpoint | A4Tech Bloody B820R installation screenshot 02 /uploads/install-screens/keyboards-20260626/a4tech-bloody-b820r-keyboard-software/a4tech-bloody-b820r-keyboard-software-install-03.webp?v=1 | Step 03 | Keyboard software setup checkpoint | A4Tech Bloody B820R installation screenshot 03 /uploads/install-screens/keyboards-20260626/a4tech-bloody-b820r-keyboard-software/a4tech-bloody-b820r-keyboard-software-install-04.webp?v=1 | Step 04 | Keyboard software setup checkpoint | A4Tech Bloody B820R installation screenshot 04