OEM versions of Windows (Dell, HP, Lenovo) use SLP to self-activate without contacting Microsoft. Chew WGA V09 injects a virtual OEM certificate and product key into the system's memory cache. This is a patch – technically, a reboot clears it, but the tool installs a service that re-injects the certificate at every startup.

While some promotional sources claim the tool is stable and safe, security researchers and technical forums highlight significant risks: Malware Detection : Analysis platforms like Hybrid Analysis