pls help thanks a lot..i want to activate all cores of my ryzen 5 2600..i know that it has 6 cores and 12 threads.thanks guys.GODBLESS
In case the MSConfig setting is grayed or doesn't have all 12 CPU's (as far as MSConfig is concerned all threads are a CPU) available to check, also look at your BIOS settings. You'll have to find where the setting is or called just find it and make sure no cores are disabled.
If you're not sure how or don't like futzing around in BIOS you could just do a CMOS Reset; instructions found in your motherboard manual.