Activation error. Digital signature is either missing or corrupted


Kaspersky Internet Security 2013


Activation error. Digital signature is either missing or corrupted

Back to "Activation errors"
2012 Oct 12 ID: 8716

If the message "Digital signature is either missing or corrupted" is displayed on the screen when working with the program, then perform the following actions:

1. Check access to the Internet

To resolve the situation, check if you have Internet access, using the web browser Internet Explorer. If you do not have access to the Internet, contact your ISP for details. Try to activate the application once again after access to the Internet is restored.

2. Configure Firewall correctly


If Firewall is installed on your computer, make sure that an allowing rule is created for the process avp.exe in the Firewall settings.  

ЗамечаниеFirewall secures your computer protection on local networks and Internet. Firewall is a program which monitors data transferred via Internet or local networks. According to the Firewall settings, it blocks or allows data transferring.

3. Check system date on your computer

You can find detailed instructions on how to check whether the system date is set correctly in KB3508

4. Repeat the activation attempt in an hour


If the recommendations described above did not help to resolve the problem, try to activate the application later (in about 15 minutes):

5. Contact Kaspersky Lab Technical Support

If the error keeps repeating, create a request to Kaspersky Lab Technical Support via the My Kaspersky Account service. Describe your problem in all details. 

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