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moonpie Win7 went EOL in 2020. Disconnect this machine from the internet forever and then do a clean install from a validated Win7 ISO.
Stop being one of those people. The PC is behind a router, there are no ports forwarded, and Windows Firewall is tuned on. That combined with safe computing practices is all anyone needs. AV is just icing on the cake. I could be completely AV free and still be totally safe. I work in fraud for a living, the days of roving bots jumping onto any PC on the internet hasn't been a thing in over 20+ years, back when people plugged their PC's directly into the back of their gen 1 cable modems or completely wide open unfiltered ISDN lines.
Plugged in behind a consumer router, with standard OOB settings, a standard Windows Firewall turned on, and using a modern web browser, a fresh Windows XP PC would be perfectly fine to use online daily. Look at all those "Do not put old windows PC's on the Internet or you will get HAXXORED!" videos on YouTube, and you'll see they are go out of their way to disable Windows Firewall, not use any router at all, and plug in a direct connection to an unsecured network to get online. Yeah, no shit, if you cut the brakes off a car, and disable every safety system designed to keep you from driving with no brakes in the car, guess what, it's gonna crash