Strange problem. From a Windows 7 Admin account I create a new user with admin privileges. Then I set a new password for the new account and log out of the original Admin account. Then I try to login to the new user with the password which I just set ... Doesn't work. I get an incorrect password error. So, considering the possibility that maybe I just miskeyed when I was setting the new password, I repeat the process. Log back into the original admin account, set up another new Admin privileged user, set the password, log out of admin, try to log into the new user and get the same wrong password error.
Before any of this occurred I did notice that the language and keyboard settings for the admin account were set to german. And, I changed this on the original admin account before creating the new users. I thought this may have something to do with the new users not working so I verified that I changed the default language, location and keyboard input.