How do you completely clean a computer from forensic artifacts?

Got curious the other day of what someone would find if they were to get my computer and found a disturbing amount of things that I "deleted"(yes, I know, cleaning the recycle bin only makes it "invisible") but also 78k web history links.

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I used Autopsy for this, is there even a chance this could all be cleaned?

artifacts autopsy cleaning computer find forensic forensic artifacts found history links privacy recycle things web yes