Change Administrator Password from User Account
--Right click on My Computer....
--Click on "manage",
--New window of "Computer Management" will get open.,
--Now on the left side of the window...click on "Local Users and Groups",
--Now on the right side double click on "users", then
--Right click on "Administrator".then
--Click on "set password"...
--Then just change it....
and then enjoy.....
You can also change it by login with any account other then Admin account