What is mcvsshl.dll?

Mcvsshl.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 mcvsshl.dll is a Windows system file or if it belongs to an application that you can trust.

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Mcvsshl.dll file information

The process known as McAfee VirusScan Shell Extension Module belongs to software McAfee VirusScan by McAfee ( or Networks Associates Technology (

Description: Mcvsshl.dll is not essential for Windows and will often cause problems. The file mcvsshl.dll is located in a subfolder of "C:\Program Files" (common is C:\Program Files\MCAFEE.COM\VSO\). Known file sizes on Windows 10/8/7/XP are 114,688 bytes (66% of all occurrences), 114,743 bytes or 135,223 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The program has no visible window. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. It is not a Windows core file. Therefore the technical security rating is 66% dangerous; however you should also read the user reviews.

Recommended: Identify mcvsshl.dll related errors

Important: Some malware camouflages itself as mcvsshl.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the mcvsshl.dll 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

McAfee VirusScan
Trojan! Go to McAfee and see for yourself.
  Mr. Shabazz   (further information)
dont worry about it

Summary: Average user rating of mcvsshl.dll: based on 4 votes with 3 user comments. 2 users think mcvsshl.dll is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user thinks mcvsshl.dll is dangerous and recommends removing it.

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Best practices for resolving mcvsshl issues

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

mcvsshl.dll [all]