Hi there, helping a friend and his 4 GB RAM laptop out. His mother won’t allow him to get another OS as I suggested, so we’re stuck with Windows 10.
Maybe boot a fast OS from an external SSD? So the harddisk can stay untouched.
Ungoogled Chromium: https://chromium.woolyss.com/ It should be the most barebones Chromium browser, hopefully using less RAM. And! Important: Download the 32bit version, even if you choose another browser. As your friend only has 4GB RAM, the max memory a 32bit software can address, you wouldn’t have any benefit from a 64bit version, and 32bit apps usually use much much less memory (RAM).
Good luck!
When it comes to browser options on Windows, your primary options are going to be Google Chrome, Microsoft Edge, or Mozilla Firefox. Firefox works well for me and my needs, but you or your friend’s results may vary. There’s also browser’s like Brave and Vivaldi, that might be worth trying. However, Brave has some crypto stuff, which can be turned off, but may not be for everyone. As for Vivaldi, it’s settings can be a bit overwhelming for first time users.
probably a bad idea: Atlas os, is Windows 10 but simmed down (and might have security risks)
I’ve used Min a few times and it’s the lightest browser I’ve ever seen. Perhaps you could give it a try.