Picture Password Sign-In is a security feature added in windows 8 operating system. In-order to Change Picture Password first of all we have to create picture password sign-in.
Here you will have a step by step procedure to change picture for your picture password sign-in.
#1 Go to PC Settings –> Users and Click on Change picture password .
#2 Now it will prompt you to Enter the account password. Just Enter the password and Click OK.
#3 Now a window will be opened to change the picture as shown below.
Click on Choose New Picture option and select the picture which you want for your picture password Sign-In.