Used CheckWindowsGenuine for Windows?
Editors’ Review
Download.com staff
Top Recommended Alternative
Pros
- Lightweight and portable, runs from a USB drive | Tells you the license type: Retail, OEM, or Volume | Free to download and use, which is nice | Doesn't hog resources, runs in the background
Cons
- Doesn't tell you *how* to fix a pirated license | Interface is super basic, it's basically a CMD window | Only useful when buying a new or used computer | Why isn't this built into Windows already?