"Databases are corrupted" or "License problem detected" error. "Cannot verify correspondence of databases to the End User License Agreement"

Issue

When you try to update the anti-virus databases, an error message pops up in the Database Update or Licensing window:

• "Databases are corrupted"

  

• "License problem detected"; "Cannot verify correspondence of databases to the End User License Agreement"

  

Solution

You will need to reinstall the program.

1. Download the installation package of the latest version of the program:
   • Kaspersky Security Cloud — Family, Personal, Free
   • Kaspersky Internet Security
   • Kaspersky Anti-Virus
   • Kaspersky Total Security
   • Kaspersky Small Office Security
2. Uninstall the program in which the issue has occurred. For instructions, see this article.
3. Restart your computer.
4. Run the installation file and follow the installation guide:
   • Kaspersky Security Cloud
   • Kaspersky Internet Security
   • Kaspersky Anti-Virus
   • Kaspersky Total Security
   • Kaspersky Small Office Security
5. Activate the program that you have just reinstalled. For instructions, see these articles:
   • Kaspersky Security Cloud 
   • Kaspersky Internet Security
   • Kaspersky Anti-Virus 
   • Kaspersky Total Security 
   • Kaspersky Small Office Security

What to do if the error persists

If reinstalling the program did not help, submit a request to Kaspersky Technical Support and include a detailed description of the issue.

• Use My Kaspersky to send a request related to Kaspersky Security Cloud, Kaspersky Internet Security, Kaspersky Anti-Virus, and Kaspersky Total Security. For instructions, see Online Help.
• Use Small Office Security Management Console to send a request related to Kaspersky Small Office Security. For instructions, see Online Help.

Useful references

How to open Kaspersky Internet Security 2017
How to update Kaspersky Internet Security 2017 databases
Support Tools in Kaspersky Internet Security 2017
How to export an update report to a file in Kaspersky Internet Security 2017
How to open Kaspersky Anti-Virus 2017
How to update Kaspersky Anti-Virus 2017
How to export an update report to a file in Kaspersky Anti-Virus 2017
Support Tools in Kaspersky Anti-Virus 2017
How to open Kaspersky Total Security 2017
How to update Kaspersky Total Security 2017 databases
System Watcher in Kaspersky Total Security 2017