if your kaspersky antivirus product unable to accept your product key, displaying errors like " incorrect activation date or incorrect key activation date " (even if your date and time is correct) there is a solution you might want to try out, this method works really well for me, follow the steps described in below.
- first of all you need to uninstall any existing kaspersky antivirus product
- then make sure your date and time correct
- now download this file and extract
- double click the file to merge with windows registry
- after that re-install your kaspersky product and activate