What is mmrtkrnl?

The genuine mmrtkrnl.sys file is a software component of Alcatech BPM Studio by Alcatech.
Mmrtkrnl.sys is a kernel driver for BPM Studio, a virtual turntable software for DJs and music producers. A kernel driver works directly with the operating system and hence, needs to function in a very stable environment. Removing this driver may result in the application not being able to function correctly. Remove the program only by uninstalling it in case there are any known issues. BPM Studio is a music program designed for live sound mixing, particularly for DJs. The program features sound editing, pitching, mixing, cue-point setting, and looping, as well as other features such as Automatic Gain Control (AGC), CD writer module, playlist management, definable columns in the archive and playlists and a BPM Print Designer. Alcatech GmbH is a German company that develops software programs, primarily their flagship software, BPM Studio. Alcatech is based in Dresden, Germany.

MMRtKrnl stands for Alcatech Microsoft Media Realtime Audio Kernel

Mmrtkrnl.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 mmrtkrnl.sys is a Windows system file or if it belongs to an application that you can trust.

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

Mmrtkrnl.sys file information

The process known as ALCATech Realtime Audio Kernel belongs to software ALCATech Realtime Audio Kernel or BPM Studio by ALCATech GmbH ( or ALCATech ( or AlcaTech (

Description: Mmrtkrnl.sys is not essential for the Windows OS and causes relatively few problems. The file mmrtkrnl.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 32,960 bytes (55% of all occurrences), 64,576 bytes and 4 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. The service has no detailed description. It is not a Windows system file. mmrtkrnl.sys appears to be a compressed file. Therefore the technical security rating is 35% dangerous.

Recommended: Identify mmrtkrnl.sys related errors

Important: Some malware disguises itself as mmrtkrnl.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the mmrtkrnl.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.


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Best practices for resolving mmrtkrnl issues

A clean and tidy computer is the key requirement for avoiding problems with mmrtkrnl. 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 mmrtkrnl.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

mmrtkrnl.sys [all]