What’s the safest way to factory-reset a 10-year-old family computer?

For personal files, check the Desktop, Documents, Downloads, Pictures, Videos, and any custom folders under every user account. Copy those to your backup drive and open a few files from the backup to confirm they transferred correctly. Don’t bother manually moving Windows or installed-program folders. Once you’re certain the backup is complete, use the recovery option to reset the computer and choose the option that removes everything. Be very careful to select the correct drive so you don’t erase your backup.

Before wiping it, make a list of the applications everyone uses, along with any installers, license keys, saved-game files, browser data, and account credentials you’ll need afterward. Programs generally can’t be moved by dragging their folders; they need to be reinstalled. It’s also worth taking screenshots or notes of important settings. For the cleanest result, install Windows from fresh installation media rather than trying to preserve the old system. If possible, replacing the decade-old hard drive or SSD is a good idea, since aging storage can fail. You can keep the old drive connected through a USB adapter afterward if you need to retrieve something.

A reset won’t make old hardware perform like new. Check the computer’s RAM, processor, storage type, and operating-system compatibility first. A ten-year-old system may not officially support newer Windows versions, and an SSD upgrade can make a much bigger difference than deleting clutter. A lightweight operating system such as ChromeOS Flex may also be worth considering if the computer is mainly used for web browsing and basic tasks. If you’re unsure about identifying the drives or making installation media, getting help in person is safer than guessing.