What is mrxsmb20?

Mrxsmb20.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 mrxsmb20.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for mrxsmb20 drivers in need of updating

Mrxsmb20.sys file information

The process known as Longhorn SMB (version 2.0 Redirector) belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original mrxsmb20.sys is an important part of Windows and rarely causes problems. Mrxsmb20.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 96,768 bytes (25% of all occurrences), 57,856 bytes, 125,952 bytes or 195,488 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. Mrxsmb20.sys is a Windows system file. The program is not visible. Mrxsmb20.sys is a trustworthy file from Microsoft. mrxsmb20.sys appears to be a compressed file. Therefore the technical security rating is 3% dangerous.

Uninstalling this variant: If problems with Microsoft Windows occur, you can do the following:
  1) uninstall the software using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program)
  2) consult Microsoft's Customer Service.

Recommended: Identify mrxsmb20.sys related errors

Important: Some malware disguises itself as mrxsmb20.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the mrxsmb20.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

There are no user opinions yet. Why not be the first to write a short comment?

Do you have additional information? Help other users!

Best practices for resolving mrxsmb20 issues

A clean and tidy computer is the key requirement for avoiding problems with mrxsmb20. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the mrxsmb20.sys process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

mrxsmb20.sys [all]