A: You likely used a trial before on that computer. You must either buy a license or use Kaspersky Free. Part 9: Is the Trial Worth It? The Final Verdict For the average home user: Yes. Download the trial immediately. Even if you plan to use the free version long-term, the trial gives you 30 days of zero-risk premium features. Use the VPN for a month. Set up Parental Controls to see if they suit your family. Test the Safe Money browser.

Either way, you win.

A: No. The 30-day clock starts the moment you activate. Even if you uninstall, the server remembers your device ID. You will need a new PC or a reformatted hard drive to reset the trial (which is not worth the effort).

Right-click the Kaspersky icon in the system tray -> "License" -> "Enter activation code." Type the 20-character code from your purchase. Your trial instantly converts to a paid subscription without reinstalling the software. Your settings, exclusions, and scan history are preserved.