Instead of trying to trick the system, the easiest and safest path to a new trial period is to simply obtain a new one through official channels.

Instead of paying the full renewal price, look out for introductory offers. Norton regularly discounts its first-year plans by 50% to 70% for new users. Buy Retail Activation Keys

HKLM\SOFTWARE\Symantec\Licensing\TrialCounter HKLM\SOFTWARE\Wow6432Node\Symantec\Licensing\InstallTime HKCU\Software\Norton\ProductID\FirstRun HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\NortonRenewalTask

Certain hardware configurations, such as specific pre-installed factory software setups on older computers, used local recovery packages to restore default software trials.