What is mbam?

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

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

Mbam.sys file information

The process known as Malwarebytes Anti-Malware or MBAMProtector belongs to software Malwarebytes' Anti-Malware or Malwarebytes Anti-Malware version or MBAMProtector by Malwarebytes (

Description: Mbam.sys is not essential for the Windows OS and causes relatively few problems. Mbam.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 22,856 bytes (25% of all occurrences), 17,144 bytes and 6 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. You can uninstall this program in the Control Panel. It is digitally signed. Mbam.sys is not a Windows core file. The file is a Verisign signed file. There is no detailed description of this service. mbam.sys appears to be a compressed file. Therefore the technical security rating is 10% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you have any problems with mbam.sys, you may also uninstall the associated program (Start > Control Panel > Uninstall a Program > Malwarebytes Anti-Malware Version or Malwarebytes' Anti-Malware) or visit the website.

Recommended: Identify mbam.sys related errors

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

part of Malwarebytes┬┤ Anti-malware
  me   (further information)

Summary: Average user rating of mbam.sys: based on 1 vote with 1 user comment. One user thinks mbam.sys is essential for Windows or an installed application.

Do you have additional information? Help other users!
What do you know about mbam.sys:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving mbam issues

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

mbam.sys [all]