I have a problem with my computer and so I reinstall Windows XP. When it open, I type in the correct 25-characters in the box. It accept me to go through and it restart from the beginning by itself. But when it pass through the top 2, it ask me to type the 25-characters again. Still, it doesn't work after I type the exact 25-characters. The question is: Is it the exact "25-characters" password that match with the Product key on the yellow sticker?