DriverCove

Realtek Bluetooth Driver - 11 (21H2 or Later) Driver

by Lenovo

This driver in brief

  • 3 releases in the catalog, from January 2022 to July 2025.
  • The newest one, 1.9.1051.3008/1.1071.2406.2401/18.4028.0.3001/18.4028.2411.1915, came out 3 years after 1.9.1041.3002.
  • Compared with the previous release: 4 hardware IDs added, 12 dropped.

What you are downloading

This file comes straight from Lenovo's own download server. We do not host it, repack it or change it in any way - the download button takes you to the manufacturer's server, not to a file of ours.

Package
m4blt20us14.exe, 2.7 MB
Published by
Realtek Semiconductor Corp.
Digitally signed
Windows checks this signature before installing
Inside
26 files - the driver itself, its setup instructions and a digital signature file
Show the full list
  • DriverSetup.exe934 KB
  • M4BLT20US14.html28 KB
  • RtkBtFilter2.sys205 KB
  • RtkBtManServ.exe222 KB
  • rtkbtfilter.cat13 KB
  • rtkbtfilter.inf5 KB
  • rtl8852b_mp_chip_new.dat71 KB
  • rtl8852bd_mp_chip_new.dat69 KB
  • rtl8852c_mp_chip_new.dat82 KB
  • PidVid_List.dat4 KB
  • RtkBtManServ.exe578 KB
  • RtkBtfilter.sys832 KB
  • Rtkfilter.inf4 KB
  • rtkfilter.cat13 KB
  • rtl8822c_mp_chip_bt40_fw_asic_rom_patch_new.dat68 KB
  • RtkBtFilter2.sys215 KB
  • RtkBtManServ.exe264 KB
  • rtkbtfilter.cat12 KB
  • rtkbtfilter.inf3 KB
  • rtl8922a_mp_chip_new.dat306 KB
  • PidVid_List.dat8 KB
  • RtkBtFilter.sys835 KB
  • RtkBtManServ.exe597 KB
  • Rtkfilter.inf4 KB
  • rtkfilter.cat13 KB
  • rtl8852a_mp_chip_bt40_fw_asic_rom_patch_new.dat66 KB

Nothing happens on its own: you download the file and decide yourself whether to install it.

Manufacturer
Lenovo
Device
Realtek Bluetooth LEAI Driver
Driver version
1.9.1051.3008/1.1071.2406.2401/18.4028.0.3001/18.4028.2411.1915
Release date
July 16, 2025
Supported Windows
Windows 11
Architecture
64-bit (x64)
File size
2.7 MB
File name
m4blt20us14.exe
Digital signature
Signed - catalog RtkBtfilter.cat
INF version
06/04/2025,18.4028.0.3001
INF provider
Realtek Semiconductor Corp.
Device class
Bluetooth
Source
Lenovo official catalog
Last verified
August 10, 2026
SHA-256
a66e623d3f4ffa1458ad441f1af9d153129f90a254ca95817239b407be6218be

Supported devices (1)

Supported hardware IDs (8)

Compare with your device: Device Manager → right-click the device → Properties → Details → Hardware Ids. If one of the values above matches, this driver supports your hardware.

How to install

Before you start: create a restore point (Start → type "Create a restore point" → Create). It takes a minute and lets you undo everything if the new driver turns out worse than the old one. This driver is made for Windows 11 (64-bit) - if your Windows is different, look for another version further down the page.

  1. Download the file with the button above - it comes directly from Lenovo official catalog.
  2. Double-click the downloaded file and follow the prompts - the installer does the rest.
  3. If it asks to restart the computer, let it.

Check it worked: open Device Manager again. The device should no longer show a warning icon, and its driver version should match the one on this page.

How to roll back

If the device stops working after the update: Device Manager → right-click the device → Properties → Driver tab → Roll Back Driver. If that button is greyed out, use the restore point you made before installing (Start → "Recovery" → Open System Restore).

All versions (3)

  • Package size: 2.70 MB, the same as the previous release.
VersionReleasedWindowsSize
1.9.1051.3008/1.1071.2406.2401/18.4028.0.3001/18.4028.2411.1915latestSHA-256July 16, 2025112.7 MBDownload
1.9.1041.3002SHA-256August 26, 2022112.6 MBDownload
1.7.1019.3006SHA-256January 20, 20221116.1 MBDownload

If the device still does not work

More Lenovo bluetooth drivers