Error "Installation files are not signed"


Kaspersky Free


Error "Installation files are not signed"

Back to "Troubleshooting"
Latest update: February 10, 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 installed on the device. Malicious programs add certificates of the protection solutions to the Untrusted Certificates folder. This prevents protection solutions from installing and launching.

Follow the steps below to solve the issue.


1. Remove malware from your computer


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


3. Check the digital signature of the installer


4. Check the system date on your computer


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


6. Fins 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.