On the computer running the Central Administration Web site, open the command line and navigate to the
Program Files\Common Files\Microsoft Shared\web server extensions\12\BIN folder.
At a command prompt, type the following command, and then press ENTER:
stsadm -o updatefarmcredentials -userlogin <domain\username> -password <newpassword>
NoteNote:
userlogin is the server farm account.
You must restart the Web application pool for the changes to be saved.
At a command prompt, type the following command, and then press ENTER:
iisreset /noforce
Alterar a senha dos serviços do Windows
