Question Underclocking a VERY old CPU

Jun 16, 2020
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So I have a very old laptop it has an i7 640M in it and I cannot buy another laptop right now. So this laptop of mine has been thermal throttling a lot recently it drops to 1.08 GHz and I can't do anything so is there anyway I can underlock this CPU. If not is there any way I can prevent the throttling. Thanks in advance.