What is mnmdd?

The genuine mnmdd.sys file is a software component of Microsoft Windows Operating System by Microsoft.
Mnmdd.sys is a system driver for the Microsoft NetMeeting program, a VoIP videoconferencing software bundled with various versions of Microsoft Windows. A driver is a software program that provides communication between the hardware and the software components of a system. Disabling this driver may stop NetMeeting from working as it is a critical component of the software. To remove the program properly, please uninstall it.

Microsoft NetMeeting initially shipped with early versions of Internet Explorer. Before the proliferation of video-conferencing over free IM clients (Yahoo! Messenger, MSN Messenger, Skype), NetMeeting had become a popular way to partake in video conferences and to chat over the Internet through ILS servers, or direct-dialing an IP address. Unfortunately, this was at a time when broadband connections were rare, so most conferences were made through phone connections.

Microsoft, founded by Bill Gates and Paul Allen in 1975, is the world's largest software maker with respect to revenue. Microsoft is best known for Windows. The company quickly rose to fame and fortune following the success of its 1986 public share offering turning three people into billionaires and an estimated 12,000 Microsoft employees into millionaires.

MNmDD stands for Microsoft Netmeeting Desktop Driver

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

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

Mnmdd.sys file information

The process known as Frame buffer simulator belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original mnmdd.sys is an important part of Windows and rarely causes problems. The mnmdd.sys file is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/8/7/XP is 4,224 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. Mnmdd.sys is a Windows core system file. The program is not visible. The service has no detailed description. Mnmdd.sys is a trustworthy file from Microsoft. mnmdd.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous, but you should also take into account the user reviews.

Recommended: Identify mnmdd.sys related errors

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

Obviously it's needed for Netmeeting desktop sharing and it is tied with mnmdd.dll

Summary: Average user rating of mnmdd.sys: based on 2 votes with 1 user comment. 2 users think it's probably harmless.

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Best practices for resolving mnmdd issues

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

mnmdd.sys [all]