On windows 10 control panel can I block browser from taking cpu for bitcoin mining?

on a browser I can click "ok" button to donate my cpu for bitcoin mining.
When I press "ok" my computer gets slow.

Windows defender did not detect this a virus

So I think I could be donating my cpu by keeping a browser window open
any website can be taking my cpu for bitcoin mining without an "ok" button

I keep many browser windows open
On windows 10 control panel can I block browser from taking cpu for bitcoin mining?
Please dont tell me it is a virus and to check for other viruses
Maybe I can just use a non admin regular windows user to ban cpu usage from my browser