On October 10, Dave W. Plummer, a Microsoft engineer, revealed that the infamous Windows XP license key FCKGW-RHQQ2-YXRKT-8TG6W-2B7Q8 was the result of an internal data breach rather than a software crack. The key was initially a Volume License Key (VLK) meant for corporate use, but management oversight led to its exposure, allowing it to spread among hackers. The Windows Product Activation (WPA) system allowed this key to bypass verification processes, making it easy for users to install unauthorized versions of Windows XP. The proliferation of "pre-activated" Windows XP CDs and ISO images led to widespread piracy. Microsoft eventually blacklisted the key and eliminated the VLK mechanism with the introduction of Service Pack 2 (SP2).