|What is 'Windows 21.08.2009'?|
I've got an XP machine I use occasionally that does that. It asks about inputing the old password and entering a new one. I just leave all that blank and click the option to change and after that it works OK. So either it has no password (then why say it's expired?) or that's all it takes to fix it.
You're not really green until you're soylent green.