Open Computer Management
In the console tree, click Users.
Computer Management > System Tools > Local Users and Groups > Users
Right-click the user account you want to modify, and then click Properties.
Make the changes you want, and then click OK.
To open Computer Management, click Start, and then click Control Panel. Click Performance and Maintenance, click Administrative Tools, and then double-click Computer Management.
Local Users and Groups overview
Change the password for a user
Create a new user account
Delete a user account
Disable or activate a user account
Modify a user account
Rename a user account