Frequently Asked Questions
Frequently Asked Questions
Excluding M-Files Client from Windows Defender
Posted by Rami Taipale (M-Files) on 28 June 2019 04:01 PM

1     Overview / Work Notes

It is usually a good idea to exclude the MFClient.exe process from any real-time scanning on the client computers. Excluding the MFClient.exe process from real-time scanning can help improve performance by preventing the virus scanner from scanning the same files twice: once when the application operates (for example, read or write) on the file and another time when MFClient.exe performs internal operations on the same file. Also, as a general note, it is known that some virus scanner can mistake M-Files activity as malicious and therefore cause issues with M-Files.

2     Solution / Workaround

If you are using Windows Defender, your M-Files Desktop computer's registry should look like this when the MFClient.exe process has been excluded from the Windows Defender. Please note that the path can vary according to the version number and architecture (32-bit / 64-bit).




  1. If it's missing, you can add it manually with Registry Editor or go to Start > Settings > Update & Security > Windows Security > Virus & threat protection.
  2. Under Virus & threat protection settings, select Manage settings, and then under Exclusions, select Add or remove exclusions.
  3. Select Add an exclusion, and then select from files, folders, file types, or process. The exclusion will apply to subfolders within a folder as well.

Additional information: M-Files User Guide has a chapter about M-Files and Virus Scanning. From there you can find guidance concerning e.g. Symantec Endpoint Protection and excluding M-Files Server processes and vault data from virus scanning on the M-Files server machine:



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