you are using the operating system to even look at add remove programs, that like trying to remove your brain.
If your purpose of removing XP is to load another operating system (windows vista, 2000, unix, etc) Then you should boot your PC with that new OS CD and choose to either replace windows XP or create a partition to use both. remember removing your OS will also remove all the files and documents you have on your PC, unless they are saved on another partition.
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