To enable all CPU Cores on Windows 11/10, you need to turn on Multi-Core Support and Hyperthreading and then use System Configuration Tool.

You can also use this feature to troubleshoot a possible CPU issue. Use the Windows System Configuration utility to set the number of processor cores the operating system utilizes.

In Windows 10 and under an administrative account you can specify which cores (of your presumably multi-core processor) gets used for explicit apps. Why would you want to do this setting?

Windows 10 19H2 will include optimizations to how instructions are processed by the CPU in order to increase the performance and reliability of the operating system and its applications.

So sure, you use Excel, it isn't going to use much cpu./core power. However, surely the Virus checker embedded int Windows 10 64 bit itself 'should' be set up to use all cores and cpu power at its ...

AMD's new X3D series of Ryzen 7000 CPUs show some amazing gaming performance. But how can you test if a game runs better on those non-cache cores?