Kaspersky Total Security stores your "trial start date" in several hidden places on your system. A simple reinstall won't work because the software leaves "markers" (registry keys and hidden files) that tell the server you have used it before.
If you want to legally reset the trial without hacking the software, there is only one surefire way: kaspersky total security reset trial
Let’s be direct:
Before resetting, uninstall Kaspersky, sign up for a new account with a different email (Gmail aliases work, e.g., yourname+kasp1@gmail.com ), and reinstall. This is not a reset but a new trial on a new account—allowed per Kaspersky’s “one trial per user” policy. Kaspersky Total Security stores your "trial start date"