If you can't afford to upgrade to Windows 8 or 10, or you don't want to because they are a privacy nightmare and spy on you constantly, do yourself a favor and switch to Linux.
You'd be surprised that many ATMs are still on XP. There have been cases of those things getting compromised.
https://www.huffingtonpost.in/2018/06/26/atms-could-be-hacked-because-banks-havent-updated-windows-despite-5-years-of-warnings_a_23468813/