Hi, in order to turn off Windows password expiration, please refer to the instructions outlined below.
1) Start your Windows 8 virtual machine.
2) Open the Run command box on Windows 8. (Please refer to this website on how to access the run command on Windows 8:
http://www.chasingeyes.com/how-to-run-command-prompt-in-windows-8.html
3) Type the following words in run box.
control userpasswords2
4) Click on Advanced tab in the user account.
5) Click on Advanced button in the Advanced user management window and it will open Local User and Group.
6) Double click the Users Folder in the Local User and Group.
7) Select your username on the lists and right click > select Properties
8) It will open another window, click on General tab and check the option of Password never expires.
9) Click on Apply and then click on OK button.
I hope this helps. Thank you