Kaspersky Small Office Security 8:

• Removed the Application Advisor feature.
• Removed the IM Anti-Virus feature.
• Removed the Trusted Applications mode.
• Removed the capability to search for vulnerabilities in the operating system.
• Limited support for the old Microsoft Edge browser. This browser no longer supports Secure Data Input and Protected Browser. You continue to be protected during Traffic scanning.
• Discontinued support for the Kaspersky Protection extension in the Internet Explorer browser.
• Removed the ability to save backups to a FTP server.
• Introduced the Browser Configuration functionality.

Kaspersky Small Office Security 6:

• The Application Manager component no longer provides the System Changes Control feature for monitoring operating system settings.
• The Web Policy Management component no longer provides control of messaging on social networks.
• The following features have been removed from the Anti-Spam component:
  • Integration with Microsoft Office Outlook and Outlook Express.
  • Management of a custom spam database.
  • Scans of messages transmitted over the Exchange MAPI protocol.
  • Addition of a sender's address to the list of allowed addresses during Anti-Spam training.
  • Actions upon detection of spam messages: move, copy, delete, and ignore.

If you want to continue using any of the removed functionality, you can go back to the previous version of the application.