Windows 11 Set Cpu Affinity Permanently [updated] May 2026

Windows 11, like its predecessors, treats CPU affinity as a temporary suggestion, not a rule. By default, the operating system’s scheduler handles core distribution dynamically. But what if you have a specific need? Perhaps you’re running an old game that crashes on multiple cores, or a real-time audio application that needs a dedicated core to avoid pops and crackles.

However, "smart" isn't always "right." If you need manual control, you have to trick Windows into reapplying the affinity every time the program launches. This is the cleanest "native" way. You will create a batch file that launches your program, waits a moment, and then forces the affinity. windows 11 set cpu affinity permanently

Have a legacy app that hates multi-core CPUs? Let us know in the comments below! Windows 11, like its predecessors, treats CPU affinity