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Caffeine 1.98 by Zhorn Software is a lightweight Windows utility designed to prevent PCs from automatically entering sleep, hibernation, or activating the screensaver by simulating an F15 keypress every 59 seconds, thereby convincing the operating system that a user is still actively typing. Occupying only a single coffee-cup icon in the system tray, the program starts enabled by default and remains unobtrusive during normal work; double-clicking the icon empties the virtual coffee pot to pause the simulation, while a second click refills it and resumes wakefulness. Beyond manual toggling, Caffeine accepts optional command-line switches—such as “-activefor:” to run for a specified number of minutes, “-on:” and “-off:” to control activation at launch, or “-key:nn” to substitute a different virtual keystroke—allowing integration into logon scripts, scheduled tasks, or remote-support scenarios where display sleep would interrupt long-running processes like file transfers, video encoding, software compilations, or unattended presentations. Because the utility alters neither global power schemes nor registry entries, it can be deployed on locked-down corporate machines without administrative rights, and it exits cleanly when the session ends, restoring the system’s original sleep behavior. The single-version release stream (currently 1.98) has remained stable across Windows XP through Windows 11, making Caffeine a perennial favorite among IT staff, livestreamers, and anyone who needs a portable, zero-config safeguard against unwanted screen locking. The software is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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