I don't think u can backtrack completely once Microsoft installs Win10 on a computer. Like someone else said if u need to get a win7 laptop or whatever, u should go only with one that has Win7 Ultimate. On the other hand, u might be further ahead to keep your system and remove Win 10 completely and reload with a fresh install of Win7 which could buy on eBay. Just buying a Win7 laptop(I assume it would be a previously used laptop by someone else(Stranger)) could develop into a major headache if it contains some virus or trojan horse deliberately left in it to track what u put in. Good Luck and remember: never trust Google, Firefox or any other browser to safekeep your passwords completely. If you are smart, play it safe by NEVER inputting access to your bank account password. Keep financial access outside your computer and cellphones. Like your pin numbers, those pswds should be written down outside the box and kept out of harm's way in a secure at home location and keep it secret.