Verifying digital signatures

Every file that can be executed in the installation ISO file has been digitally signed so that the origin of the files can be verified. The installed files are also digitally signed.

Before you begin

The ISO file needs to be accessible.

About this task

To verify that the installation files have not been tampered with by viruses, or other malicious software, you can check their digital signatures by following these illustrated steps.


  1. Right-click the files in Windows Explorer (particularly executables, DLLs, and MSI files), and on the Context menu, click Properties.
  2. Click the Digital Signatures tab.
    If the tab does not exist, the file's signature is corrupt and therefore cannot be trusted.
    • If you find a signer named, select it, and click Details.

    • If the signature list does not contain a signer named , then the file has not been signed by Visma and therefore cannot be trusted.
  3. Click View Certificate.
  4. Verify that the line Issued by says Symantec Class 3 SHA256 Code Signing CA.
    If it does not, the signature is not valid, and the file therefore cannot be trusted.

We would appreciate your feedback. Send feedback on this topic to Visma.