What is mrxsmb10?
The genuine mrxsmb10.sys file is a software component of Microsoft Windows Operating System by Microsoft Corporaiton.
"Mrxsmb10.sys", Microsoft's "Longhorn SMB Downlevel Subredirector", is a Microsoft driver in "C:\Windows\System32\drivers" depended upon by the LanManWorkstation service. Mini-redirectors are drivers used when a client computer drive letter is "redirected" to operate on a server drive. This involves the Server Message Block (SMB) protocol. "Longhorn" was a Windows OS release codename (client and server versions) released around 2007. When a network's server and/or client(s) were neither Vista nor Longhorn, this was a "downlevel" connection and "mrxsmb10.sys" was needed for SMB version 1.0. In 2017, the WannaCry ransomware began exploiting SMBv1.0 shortcomings and users are urged to disable that version.
mrxsmb10 stands for Longhorn Mini-Redirector For Server Message Block 1.0
Mrxsmb10.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 mrxsmb10.sys is a Windows system file or if it belongs to an application that you can trust.
Run a free scan to check for mrxsmb10 drivers in need of updating
Mrxsmb10.sys file information
The process known as Longhorn SMB Downlevel SubRdr belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).
Description: The original mrxsmb10.sys is an important part of Windows and rarely causes problems. The mrxsmb10.sys file is located in the C:\Windows\System32\drivers folder.
Known file sizes on Windows 10/11/7 are 230,400 bytes (33% of all occurrences), 225,792 bytes, 211,456 bytes, 286,720 bytes or 223,744 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs.
The mrxsmb10.sys file is a Windows core system file. The program is not visible. The mrxsmb10.sys file is a Microsoft signed file.
mrxsmb10.sys appears to be a compressed file.
Therefore the technical security rating is 2% dangerous.
Recommended: Identify mrxsmb10.sys related errors
Important: Some malware disguises itself as mrxsmb10.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the mrxsmb10.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.
Best practices for resolving mrxsmb10 issues
A clean and tidy computer is the key requirement for avoiding problems with mrxsmb10. 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the mrxsmb10.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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
Other processes
acprfmgrsvc.exe segurazoclient.exe raysat_3dsmax2014_64server.exe mrxsmb10.sys mbamiservice.exe turbov.exe cltoast.exe 4zsrcas.dll usbdetector.exe desktoplayer.exe tscupgrd.exe [all]
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