Older operating systems are generally less safe than newer ones, especially if they’re connected to an IP network such as the internet. If you have any devices that do not support the latest releases of their OSes (e.g., a PC that couldn’t install Windows 10), think about replacing them with something more recent.

If you have an older PC you’re still using, consider installing a Linux distribution such as Ubuntu alongside the existing Microsoft Windows installation. While not inherently more secure, Linux-based operating systems are less frequently targeted by malware. Plus their hardware requirements are very minimal, meaning they’ll run well even on aging machines.