Hey guys,
I was looking for a solution to further lower my CPU usage mainly from the bot, but this can be used for pretty much any process, especially one that you're not actively using (I suggest you don't try this with, let's say, Photoshop, where you need the best performance).
1. Open the Task Manager (Ctrl+Alt+Del) or press Windows+R and type in taskmgr.
2. Right click OSBot and select "Go to process".
3. Now, you should see the OSBot process (usually java.exe). Right click it and select "Set Affinity..."
4. If you have a multi-core CPU (assuming most or even all of you do), you'll be able to see the cores.
5. Select one (or two, three...) of the CPUs and hit OK.
That's it.