We just went through some trials and tribulations getting my new Windows 7 computer to fully network with several XP computers on the same homegroup. In the process, we installed an "Administrator Password" on my user account. I know the password as I am able to turn the machine off and log back on without a problem. However, when I tried to change the password, it now says "Windows Cannot Change The Password". Did we some how put a security check somewhere where I, the Administrator, who knows his password and can log into the system, is no longer allowed to change it? Help.