电脑怎么改开机密码

To change the startup password on a computer, you can follow these general steps:

1. Press the Windows key + R to open the Run dialog box.
2. Type "netplwiz" and press Enter to open the User Accounts window.
3. Select the user account for which you want to change the password.
4. Click on the "Reset Password" or "Change Password" button.
5. Follow the on-screen instructions to set a new password for the selected user account.
6. Restart your computer to apply the changes.

Please note that the exact steps may vary depending on the operating system you are using.