ELK wrote on 2025-07-10, 19:17:

you can make a batch file

perhaps you right. Batch file give more features for this.

You can do it in a normal shortcut.

You just have to put "start /affinity 0x1 exename"

I put 0x1, because its hex. if you want to use any other single core, options should be 2,4,8,16,32 etc for one core.
ie, the hex is a binary number with each bit representing one core. The first 2 cores should be "0x3"