What is btkrnl?

Btkrnl.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if btkrnl.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for btkrnl drivers in need of updating

Btkrnl.sys file information

The process known as Bluetooth Bus Enumerator or Bluetooth Protocol Driver for Windows (version 2000) belongs to software HP Integrated Module with or Bluetooth Software (version 3.0.1 Build 3, 1.4.2 Build 10) or WIDCOMM Bluetooth Software or Bluetooth Bus Enumerator by Broadcom ( or WIDCOMM (

Description: Btkrnl.sys is not essential for the Windows OS and causes relatively few problems. Btkrnl.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 1,342,602 bytes (26% of all occurrences), 1,341,466 bytes and 8 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. There is no detailed description of this service. The btkrnl.sys file is not a Windows system file. You can uninstall this program in the Control Panel. btkrnl.sys appears to be a compressed file. Therefore the technical security rating is 22% dangerous; however you should also read the user reviews.

Uninstalling this variant: In case you experience problems using btkrnl.sys, you can also safely remove the program using the uninstall program of HP Integrated Module with or WIDCOMM Bluetooth Software (Control Panel ⇒ Uninstall a Program).

Recommended: Identify btkrnl.sys related errors

Important: Some malware disguises itself as btkrnl.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the btkrnl.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

sigverif gives me information that btkrnl.sys is not signed. From which driver should i replace it? I am using compact v2000 series model with integrated hp bluetooth.
  atul chadha  
It is part of the Widcomm bluetooth stack. It is part of the driver for Bluetooth Bus Enumerator by Widcomm
Mine's 1,240,938 bytes on XP SP2, but Bluetooth isn't working...
  Paul J  
using bluetooth on usb for wii remote control using widdcom that is a few years old, just need to restart pc & it should be fine

Summary: Average user rating of btkrnl.sys: based on 4 votes with 4 user comments. 3 users think btkrnl.sys is essential for Windows or an installed application. One user thinks it's probably harmless. One user is not sure about it.

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Best practices for resolving btkrnl issues

A clean and tidy computer is the key requirement for avoiding problems with btkrnl. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the btkrnl.sys process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

btkrnl.sys [all]