Here’s a write-up for a — including what it is, why it’s needed, how to use it safely, and alternatives. Microsoft Office Cleaner Tool: Complete Guide What Is a Microsoft Office Cleaner Tool? A Microsoft Office Cleaner Tool is a utility designed to completely remove Microsoft Office installations from a Windows PC. Unlike a standard uninstall, which often leaves behind registry entries, cached files, activation data, and corrupted settings, a cleaner tool performs a deep scrub.