What is gameprioritymanager?

Game Priority Manager, or GPM, is a Windows desktop app that permanently tells Windows to give a specific game more or less CPU and disk priority whenever that game's program is launched. The goal is to stop background programs from slowing down the game you are actually playing, without needing any extra app running in the background or sitting in the system tray while you play. It works by writing a small setting into a part of the Windows registry that the operating system itself already uses to control how much priority a program gets, called Image File Execution Options. Because Windows applies this setting automatically every time the matching program starts, GPM does not need to keep running after you set it up once. The app can automatically scan for games installed through Steam, Epic Games, GOG, and to a lesser extent EA and Ubisoft Connect, and it also lets you add a game by hand if it is not detected automatically. For each game, you choose a CPU priority level, such as normal, above normal, or high, and a similar priority for disk access, from a simple dropdown menu. Applying your choices requires administrator permission, but GPM only asks for that permission briefly, at the moment you apply changes, rather than running with elevated access all the time. The project deliberately does not offer the highest realtime priority setting, since that can destabilize the whole system. The app is written in C# using .NET and includes an automated test suite as well as a separate small tool for verifying that Windows is actually honoring the priority settings it applies. It is released under the PolyForm Noncommercial License, which allows personal, noncommercial use and modification but requires a separate license from the author for any commercial use. This tool is aimed at PC gamers on Windows who are comfortable running an installer and granting administrator access, rather than casual users unfamiliar with such settings.