What is msmdev.dll?

Msmdev.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if msmdev.dll is a Windows system file or if it belongs to an application that you can trust.

Click to Run a Free Scan for msmdev.dll related errors

Msmdev.dll file information

The process itself does not contain any references to its author. However, a few interesting pieces of information are available from other sources.

Description: Msmdev.dll is not essential for the Windows OS and causes relatively few problems. Msmdev.dll is located in the C:\Windows folder or sometimes in a subfolder of C:\. Known file sizes on Windows 10/8/7/XP are 266,240 bytes (35% of all occurrences), 229,376 bytes, 319,488 bytes, 270,336 bytes or 225,280 bytes. 
The program has a visible window. There is no file information. The software is loaded during the Windows boot process (see Registry key: ShellServiceObjectDelayLoad). Msmdev.dll is not a Windows system file. Therefore the technical security rating is 36% dangerous.

Recommended: Identify msmdev.dll related errors

Important: Some malware camouflages itself as msmdev.dll, for example not-a-virus:AdWare.Win32.Agent.ka or (detected by Kaspersky), and TROJ_ZLOB.LLD (detected by TrendMicro). Therefore, you should check the msmdev.dll process on your PC to see if it is a threat. If msmdev.dll has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


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Best practices for resolving msmdev issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active msmdev process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the msmdev.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. 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.

Other processes

msmdev.dll [all]