To change the password to never expire.
* Right click My Computer
* Select Manage
* Go to Local Users and Groups/Users
* Right-click on user to change
* Select Properties
* On General tab, check Password never expires
* Click OK
To allow logging in without a password... (Do not recommend)
* Click Start
* Click Run
* Enter gpedit.msc
* Click OK
* Select Computer
configuration
* Select Windows Settings
* Select Security Settings
* Select Local Policies
* Select Security Options
* Double click on Accounts
* Disable the option Limit local account use of blank passwords to console login only