Among Windows experts, a clean install is a time-honored ritual, a way to wipe out accumulated cruft and restore an old PC to new life.
You can find plenty of perfectly good reasons to do a clean install. You might be repurposing an old but still serviceable PC for use by someone else in your family or your organization. Perhaps you’ve decided to replace a conventional hard disk drive with a fast solid-state drive to extend the life of an older PC. Or maybe you just want a fresh start.