How to verify the digital signature of an EmEditor installer

This guide explains how to confirm that the EmEditor installer you downloaded is genuine and comes from us.

EmEditor installer files have the extension .msi and are always signed. When you check its signature, it should show:

Name: Emurasoft, Inc.
E-mail: info@emurasoft.com

If these fields differ, or if the signature is missing or invalid, do not run the installer, and contact us.

Verification steps

An EmEditor installer is valid if and only if all of the checks in the four steps are valid.

  1. Verify the installer file is signed by Emurasoft
    • Downloads have a URL with the domain of download.emeditor.info. They are linked in the downloads page of Customer Center.
    • In File Explorer, right‑click the downloaded installer and click Properties.
    • Go to the Digital Signatures tab.
      • ✅ A digital signature should be present.
      • ❌ If there is no digital signature, the installer is untrusted. Do not run the installer.

  1. In the Embedded Signatures list, double click the entry with name Emurasoft, Inc.
    • ✅ You see a signature entry with name Emurasoft, Inc.
    • ❌ If there is no signature from Emurasoft, Inc., the installer is untrusted.
  2. In the Digital Signature Details window, check the status message at the top:
    • ✅ You see a message like: “This digital signature is OK.”
    • ❌ If the message shows “The digital signature is not valid.” or any other error message, and NOT “This digital signature is OK.”, treat the installer as untrusted.

  1. Under Signer information, verify the following fields:
    • ✅ Name: Emurasoft, Inc.
    • ✅ E-mail: info@emurasoft.com
    • ❌ If any of those fields do not match, the installer is untrusted, even if it says “This digital signature is OK.”.

Summary

  • The installer is trusted only if all of these are true:
    • There is a Digital Signatures tab.
    • Digital Signature Details shows: “This digital signature is OK.”
    • The signer Name is Emurasoft, Inc..
    • The E-mail is info@emurasoft.com.
  • If any of these checks fails for an EmEditor installer:
    • The installer is untrusted. Do not run the installer as it may be malware or a corrupted installer.
    • Contact us about an installer with an invalid signature
    • Go to the downloads page of Customer Center and download an installer with a valid signature.