A Windows 10 password reset disk is a physical disk or USB flash drive that contains a special file used to reset your password if you forget it. This file is called the "registration key" and is used by the Windows 10 operating system to verify that you are the owner of the account.If you forget your password, you can use the password reset disk to create a new one. The process is relatively simple and only takes a few minutes.Here's how to create a Windows 10 password reset disk:1. Insert a blank USB flash drive into your computer.2. Open the Control Panel and click on User Accounts.3. Under the "Make changes to your user account" section, click on the link that says "Create a password reset disk".4. The "Forgot Password Wizard" will now open. Click on the Next button.5. Select the USB flash drive that you inserted earlier and click on the Next button.6. Enter a new password in the "New Password" field and confirm it in the "Confirm Password" field.7. Click on the Next button and then click on the Finish button.Your password reset disk is now ready and you can use it to reset your password if you ever forget it.To use the password reset disk, insert it into the computer and boot from it. When prompted, enter the registration key and then follow the instructions to reset your password.If you don't have a password reset disk, you can still reset your password by using the Microsoft Account Recovery Tool. This tool can be used if you've forgotten your Microsoft account password.If you're still having trouble resetting your password, you can contact Microsoft support for further assistance.