A service pack is a cumulative update package that is a superset of all updates, and even service packs, that have been released before it.[70] Three service packs have been released for Windows XP. Service Pack 3 is slightly different, in that it needs at least Service Pack 1 to have been installed, in order to update a live OS.[71] However, Service Pack 3 can still be embedded into a Windows installation disc; SP1 is not reported as a prerequisite for doing so.[72]
Headed by former computer hacker Window Snyder,[79][80] the service pack's security improvements (codenamed "Springboard",[81] as these features were intended to underpin additional changes in Longhorn) included a major revision to the included firewall (renamed Windows Firewall, and now enabled by default), and an update to Data Execution Prevention, which gained hardware support in the NX bit that can stop some forms of buffer overflow attacks. Raw socket support is removed (which supposedly limits the damage done by zombie machines) and the Windows Messenger service (which had been abused to cause pop-up advertisements to be displayed as system messages without a web browser or any additional software) became disabled by default. Additionally, security-related improvements were made to e-mail and web browsing. Service Pack 2 also added Security Center, an interface that provides a general overview of the system's security status, including the state of the firewall and automatic updates. Third-party firewall and antivirus software can also be monitored from Security Center.[82]
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The third and final Service Pack, SP3, was released through different channels between April[3] and June 2008,[86] about a year after the release of Windows Vista, and about a year before the release of Windows 7. Service Pack 3 was not available for Windows XP x64 Edition, which was based on the Windows Server 2003 kernel and, as a result, used its service packs[87] rather than the ones for the other editions.[88]
Support for the original release of Windows XP (without a service pack) ended on August 30, 2005.[4] Both Windows XP Service Pack 1 and 1a were retired on October 10, 2006,[4] and both Windows 2000 and Windows XP SP2 reached their end of support on July 13, 2010, about 24 months after the launch of Windows XP Service Pack 3.[4] The company stopped general licensing of Windows XP to OEMs and terminated retail sales of the operating system on June 30, 2008, 17 months after the release of Windows Vista.[114] However, an exception was announced on April 3, 2008, for OEMs producing what it defined as "ultra low-cost personal computers", particularly netbooks, until one year after the availability of Windows 7 on October 22, 2009. Analysts felt that the move was primarily intended to compete against Linux-based netbooks, although Microsoft's Kevin Hutz stated that the decision was due to apparent market demand for low-end computers with Windows.[115]
AEM 6.4.2.0 is an important update that includes performance, stability, security and key customer fixes and enhancements released since the general availability of AEM 6.4 in April 2018.It is also cumulative which means that 6.4.2.0 includes all AEM 6.4 service packs release before it.
For customers with Feature Packs installed on AEM 6.4. Optional Feature Packs provided by Adobe have dependencies on the release version and service pack. If you have any Feature Pack installed, please contact the AEM Customer Care team to validate the compatibility of those feature packs with this service pack for AEM 6.4. 2ff7e9595c
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