Windows XP Service Pack 1a (SP1a)

Windows XP Service Pack 1a (SP1a) provides the latest security and reliability updates to the Windows XP family of operating systems, and includes Internet Explorer 6 SP1a. Windows XP SP1a is designed to ensure Windows XP platform compatibility with newly released software and hardware, and includes updates that resolve issues discovered by customers or by Microsoft’s internal testing team. If you have already installed Windows XP SP1, you do not need to Windows XP SP1a.
Changes in Current Version:

  Windows XP SP1a does not include or install the Microsoft VM, which provides

  support for running Java programs

  The title for the Windows XP Service Pack 1 entry in the Add or Remove Programs

  tool in Control Panel is changed to “Windows XP Service Pack 1a.”

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