I started with MS-DOs 2.11 on a 5.25" floppy disk and am currently running 3 laptops, all with Windows 11, latest Service Pack. My recommendations:
1. Firefox with full privacy features turned on;
2. All privacy extensions recommended by EFF.org (
https://www.eff.org/pages/tools)
3. Only have ONE browser page open at a time
4. PAY for a good firewall (I prefer Norton 360) that allows you to configure all inbound and outbound traffic; default to "Block"
5. Invest in a good VPN; Proton recently caught 2 trackers attached to an email that Norton didn't
6. Disconnect the computer from the Wi-Fi when you're not using it and TURN IT OFF
7. Run BleachBit (Eff.org) after you disconnect from the net and upon startup.
Stay away from the following products (in order of toxicity):
1. Google / Alphabet;
2. Amazon / Alexa / AWS;
3. Microsoft / Microsoft "store"
4. "Smart" speakers / TV's etc. Yes, they are always listening. Yes, you gave up your rights to privacy when you turned the damned thing on. Yes, there is a permanent digital recording of everything the smart device "hears". And finally, yes, those recordings have been used and held up as legally obtained evidence in criminal courts.