(There are versions of different platforms available for download. There are 32 bit and 64 bit versions of Windows platform. You can choose the version of Windows platform based on your own computer. You use 32-bit WindowsXP system, so you can choose to download jdk-7u4-windows-i586.exe. If your computer's Windows system is 64 bit, you should choose to download jdk-7u4-windows-x64.exe. This document includes the following annexes:)