You see the following error when installing Endpoint Protection 14 on an Windows XP or Server 2003 computer:
Symantec Endpoint Protection 14 can only be installed on Windows Vista / Server 2008 and later. For Windows XP / Server 2003, you must install the
legacy 12.1 client package.
Microsoft has discontinued the support of Windows XP and Server 2003 operating systems and is no longer patching or updating these systems. These legacy operating systems are foundational are not capable of supporting the new protection technology and features, or the performance enhancements in Endpoint Protection 14.
Symantec strongly recommends that you replace these machines with a current Microsoft supported operating system for the best security and reliability for today's threat environment.
The Endpoint Protection 14 manager can successfully deploy, administer, and update the legacy version of Endpoint Protection 12.1 clients for these operating systems. This mixture of versions is usually a temporary condition as the endpoints in the organization are upgraded. In the case of Windows XP and Server 2003 endpoints, it may be necessary to use the 12.1 client until the computers running the legacy operating system are retired. Please follow these steps if your environment requires the use of the 12.1 client:
Once the legacy 12.1 client package has been imported, you can use these client packages for deployment to Windows XP and Server 2003 operating systems. For more information about deploying the client see document TECH164327.