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PC Guard: Demo Mode

The PC Guard software protection suite includes a comprehensive "Demo mode" feature designed to create robust trial versions of applications. This mode operates by imposing one or more limitations on the protected software, which can be combined as needed. There are four primary types of limitations: a finite number of executions (number of runs), a set number of days from the first launch, a fixed calendar period, and a cap on total application runtime. The system provides granular control over the end-user experience, particularly regarding the activation dialog box. Developers can configure when this dialog appears, such as always on startup, only when a trial period is nearing its end (based on a "threshold" of remaining days or runs), or when manually invoked by a special key. Advanced capabilities include a secure mechanism for resetting trial periods for new software updates, a feature contingent on a sequentially increasing Update ID to prevent abuse. Furthermore, the demo mode can be integrated with serial numbers, requiring users to input a valid serial to access the trial. The system is designed to be tamper-resistant, preventing users from extending their evaluation period by simply reinstalling the application. This demo functionality is compatible with all of PC Guard's core protection methods, including REMOTE, PLAIN, and USB.