Download Tails virtual OS and boot up your machine using it on a thumb drive.
If this isn't enough and you want to go the extra nine yards, use a public library computer or something so that they can't even trace it back to your machine.
What are you aiming to use it for?
am becoming quite anonymous 'tis a fun challenge :):) I had been starting to become very interested in the deepweb and anonymity before my last psych hospitalization but did not have the motivation due to the depression I was in, luckily I am not too depressed anymore and can resume my interests
fuck google got all their shit off my phone even
Signal private messenger is a decent communication encryption app btw can be used for texts calls and videochat https://www.signal.org/
and duckduckgo for browser
