If required, you can easily change both Local User and Microsoft User Password on your computer. You will find below the steps to Change User Password in Windows 10.
Change User Password in Windows 10
You can login to your computer using both Local User Account and Microsoft User Account.
Local User Account allows you to login to your own computer (single device), where as Microsoft User Account allows you to login to multiple computers using the same Microsoft Account.
Also, a Microsoft User Account provides you with access Windows services like OneDrive, Skype and Microsoft Store.
If you are looking for a way to Change the Windows Password for your computer, it is likely that the Password for your computer has been compromised or you want to change it due to other reasons.
You will find below the steps to Change User Password in Windows 10 and also the steps to use a 4-Digit PIN or Picture as the Login Password for your computer.
1. Change Local User Account Password in Windows 10
If you are using a Local User Account, you can follow the steps below to change User Password in Windows 10.
1. Click on the Start button and then click on the Settings Icon.
2. On the Settings Screen, click on the Accounts option.
3. On Accounts screen, click on Sign-in options in the left pane. In the right-pane, click on the Change button located under ‘Password’ section.
4. On the Change Password Screen, enter you Current Password and click on the Next button.
5. On Change Password screen, enter your New Password and click on the Next button.
6. On the next screen, click on the Finish button.
With above steps, you have successfully completed the process of changing Local User Account Password in Windows 10.
2. Change Microsoft User Account Password in Windows 10
Follow the steps below to change Microsoft User Account Password in Windows 10.
1. Open Settings > click on Accounts.
3. On the Accounts screen, click on Sign-in Options in the left pane. In the right-pane, click on the Change button, located under ‘Change your account password’ section.
4. On the next screen, enter your current Microsoft User Account Password and click on Sign in. 
5. On the next screen, enter the Email Address or Phone Number associated with your Microsoft Account and click on Next.
Note: Microsoft will now send a verification code to your Email Address or Phone.
6. Enter the Verification Code as received from Microsoft and click on Next.
7. On the next screen, enter your existing Microsoft Account Password and then Enter and verify your New Password.
You will see Password Changed Prompt, once your Microsoft User Account Password is changed.
3. Change User Account Password to PIN
Instead of using your regular User Password, you can setup your computer to allow login using a 4 digit pin.
1. Open Settings > Go to Accounts > Sign-in Options
2. On the sign-in options screen, click on the ADD button located under “PIN” section.
3. On the next screen, enter your Current User Password and click on Ok.
4. On the next screen, enter a 4 digit PIN and click on OK.
You will now be able to login to your computer using this 4-digit PIN, instead of using your regular User Password.
4. Change User Account Password to Picture
Another login option as available in Windows 10 is to use picture or pattern, instead of using your regular User Password.
1. Open Settings > Go to Accounts > Sign-in Options.
2. On the sign-in options screen, click on the ADD button located under “Picture Password” section (See image below)
3. On the next screen, enter your Current User Password and click on Ok.
4. Next, follow the instructions to setup a Picture as the Login Password for your computer.