Error "Installation files are not signed”


Kaspersky Free


Error "Installation files are not signed”

Back to "Troubleshooting"
Latest update: August 12, 2020 ID: 13816

When installing Kaspersky Free, you may get the error message “Installation files are not signed”. 

This error might be caused by a malicious program that adds certificates of the protection solutions to the Untrusted Certificates folder. This prevents anti-virus programs from installing and launching.

Follow the steps below to solve the issue.


Step 1. Remove malware from your computer


Step 2. Check if there are any Kaspersky certificates in the Untrusted Certificates folder


Step 3. Check the digital signature of the installer


Step 4. Check the system date on your computer


Step 5. Define Software Restrictions Policies settings (Windows XP/Vista)


Step 6. Find the solution in Community

Was this information helpful?
Yes No
Thank you


How can we improve this article?

Your feedback will be used for content improvement purposes only. If you need assistance, please contact technical support.

Submit Submit

Thank you for your feedback!

Your suggestions will help improve this article.