Instructions
Download the file that is appropriate for your operating system version and platform.

For Windows Vista, Windows Vista Service Pack 1 and Windows Server 2008:
x86 Platform: Windows6.0-KB942288-v2-x86.msu
x64 Platform: Windows6.0-KB942288-v2-x64.msu
IA64 Platform: Windows6.0-KB942288-v2-ia64.msu

For Windows XP Service Pack 2 and Windows XP Service Pack 3 (32-bit platforms):
x86 Platform: WindowsXP-KB942288-v3-x86.exe

For Windows Server 2003 Service Pack 1, Windows Server 2003 Service Pack 2 and Windows XP 64-bit Editions:
x86 Platform: WindowsServer2003-KB942288-v4-x86.exe
x64 Platform: WindowsServer2003-KB942288-v4-x64.exe
IA64 Platform: WindowsServer2003-KB942288-v4-ia64.exe

For complete information on installing or upgrading Windows installer, including command line options, please see the Windows Installer Start Page on MSDN.