Kaspersky and most other modern tools require SP1 to function correctly. Ensure your Windows 7 is fully updated to the last available public patch.
Since Microsoft no longer provides security patches for Windows 7, your antivirus is your last line of defense. kaspersky anti virus free download windows 7 64 bit
Beyond real-time protection, perform a "Full Scan" once a week to ensure no dormant threats are hiding in your system files. Kaspersky and most other modern tools require SP1
Follow the on-screen prompts. You will likely be asked to create or sign in to a My Kaspersky account to activate the free license. kaspersky anti virus free download windows 7 64 bit