Installation files are not signed


Installation files are not signed

Back to "Installation errors"
Latest update: 2019 Apr 24 ID: 11004

When installing a Kaspersky Lab product, you may receive the error message Installation files are not signed.

Malware can cause this error by installing antivirus products’ certificates in the Untrusted Certificate repository. This prevents antivirus programs from installing and launching.


Check for Kaspersky Lab certificates in the Untrusted Certificates folder


Check the digital signature of the installer


Check the system date on your computer


Define Software Restrictions Policies settings (Windows XP/Vista)


Contact Technical Support

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