📚 alternatives to iis (home hosting)

i've always been a windows user, had no problems with it, until a week ago, after an update or just the os going crazy, ethernet connection starting working intermittently, making my users crash very often and complain. i can't figure out what's wrong as the other pc's work fine, trying windows 7/8.1 fixed that, but i dont wanna use an unsecure older os just because the latest version is faulty. community support was very annoying as they just copy pasted a guide to run an automatic troubleshoot. i've never used linux or nginx, like, never. where do i start?