Windows XP is an operating system produced by Microsoft for use on personal computers, including home and business desktops, laptops and media centers. First released to computer manufacturers on August 24, 2001, it is the most popular version of Windows, based on installed user base The name "XP" is short for "eXPerience."

Windows XP, the successor to Windows 2000 and Windows Me, was the first consumer-oriented operating system produced by Microsoft to be built on the Windows NT kernel. Windows XP was released for retail sale on October 25, 2001, and over 400 million copies were in use in January 2006.Direct OEM and retail sales of Windows XP ceased on June 30, 2008. Microsoft continued to sell Windows XP through their System Builders (smaller OEMs who sell assembled computers) program until January 31, 2009.

Service Pack 3:

Windows XP Service Pack 3 (SP3) was released to manufacturing on April 21, 2008, and to the public via both the Microsoft Download Center and Windows Update on May 6, 2008.
It began being automatically pushed out to Automatic Update users on July 10, 2008.A feature set overview which details new features available separately as standalone updates to Windows XP, as well as backported features from Windows Vista has been posted by Microsoft.A total of 1,174 fixes have been included in SP3.Service Pack 3 can be installed on systems with Internet Explorer versions 6, 7 or 8 Internet Explorer 7 and 8 are not included as part of SP3.

New features in Service Pack 3:

NX APIs for application developers to enable Data Execution Prevention for their code, independent of system-wide compatibility enforcement settings

Turns black hole router detection on by default

Support for SHA-2 signatures in X.509 certificates

Network Access Protection client

Group Policy support for IEEE 802.1X authentication for wired network adapters.

Credentials Security Service Provider

Descriptive Security options in Group Policy/Local Security Policy user interface

An updated version of the Microsoft Enhanced Cryptographic Provider Module (RSAENH) that is FIPS 140-2 certified (SHA-256, SHA-384 and SHA-512 algorithms)

Installing without requiring a product key during setup for retail and OEM versions If Require Key Then Use This Mr49R-Drjxx-M6Px2-V96Bf-8Ckbj

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