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System Locked Pre-installation (SLP), also referred to as OEM Activation, is a product activation procedure for Microsoft Windows used by major OEMs of laptops and pre-built PCs wherein a Windows product key is added and locked to the machine's firmware before mass distribution. SLP product keys cannot be moved to other machines.
On Windows 10 and Windows 11, the activation process can also generate a "digital entitlement", which allows the operating system's hardware and license status to be saved to the activation servers, so that the operating system's license can automatically be restored after a clean installation without the need to enter a product key.
A copy protection system known as Windows Product Activation was introduced with Windows XP and its server counterpart, Windows Server 2003. All non-enterprise (Volume Licensing) Windows licenses must be tied to a unique ID generated using information from the computer hardware, transmitted either via the internet or a telephone hotline. If ...
A product key is required to proceed and use Windows 95. In one form, product activation refers to a method invented by Ric Richardson and patented (U.S. patent 5,490,216) by Uniloc where a software application hashes hardware serial numbers and an ID number specific to the product's license (a product key) to
Product key on a Proof of License Certificate of Authenticity for Windows Vista Home Premium. A product key, also known as a software key, serial key or activation key, is a specific software-based key for a computer program. It certifies that the copy of the program is original. Product keys consist of a series of numbers and/or letters.
Windows XP has been criticized for its vulnerabilities due to buffer overflows and its susceptibility to malware such as viruses, trojan horses, and worms.Nicholas Petreley for The Register notes that "Windows XP was the first version of Windows to reflect a serious effort to isolate users from the system, so that users each have their own private files and limited system privileges."
Windows Genuine Advantage (WGA) was an anti-infringement system created by Microsoft used to validate the licences of several Microsoft Windows operating systems upon accessing services such as Windows Update and Microsoft Download Center.
Windows XP Media Center Edition 2005 Update Rollup 2 — [32] Diamond — Windows Media Center: Included with Windows Vista. [32] Springboard — — Set of enhanced security features, included in Windows XP Service Pack 2. [33] Lonestar — Windows XP Tablet PC Edition 2005 — [34] Whistler Server Windows 2002 Server, Windows .NET Server ...