Windows 7 was the last great proprietary operating system before all the corporate brands went to shit. Windows XP was good too but unfortunately XP is easily compromised if taken online for extended periods of time. There are viruses that actively seek out IPs connected to XP to auto-infect them. That may go for 7 at this point too but not sure. AI will probably make this problem a lot worse in the future so you definitely should be creating offline backups and using cheaper refurbished burner laptops. Never trust these older operating systems for storing personal identifying information unless you air-gap them. For example, I only use a burner laptop connected to the internet for torrent & p2p file sharing. I use it for nothing personal or any sort of identity.