How to unlock computer without password?

 Unlocking a computer without knowing the password can be necessary if you've forgotten it or are otherwise locked out. The methods to unlock a computer depend on the operating system (OS) you're using. Here are some common methods for both Windows and macOS.

Windows

1. Using Another Account (Administrator Privileges Needed)

1. Log in with another account: If there’s another account with administrator privileges, log in with that account.
2. Change the password:
   • Open Control Panel.
   • Go to User Accounts.
   • Select Manage another account.
   • Choose the account you need to unlock and select Change the password.

2. Using Safe Mode

1. Boot into Safe Mode:
   • Restart your computer.
   • Press F8 (or Shift+F8) during startup to access the boot menu.
   • Select Safe Mode.
2. Log in as the Administrator: In Safe Mode, there might be an account named “Administrator” without a password.
3. Change your account password:
   • Open Control Panel.
   • Go to User Accounts and change the password of your account.

3. Using Password Reset Disk

1. Insert the password reset disk: During the login screen, insert the password reset disk you created.
2. Follow the prompts: Follow the wizard to reset your password.

4. Using Command Prompt (Requires Bootable Media)

1. Create a Windows installation media: Use a USB drive or DVD.
2. Boot from the installation media: Change the boot order in BIOS/UEFI to boot from the USB/DVD.
3. Open Command Prompt:
   • Select Repair your computer.
   • Go to Troubleshoot > Advanced options > Command Prompt.
4. Replace Utilman.exe with cmd.exe:
   • Type copy c:\windows\system32\utilman.exe c:\.
   • Type copy c:\windows\system32\cmd.exe c:\windows\system32\utilman.exe.
5. Reboot: Remove the installation media and restart your computer.
6. Open Command Prompt from the login screen: Click the Ease of Access button.
7. Reset the password: In the Command Prompt, type net user username newpassword (replace "username" with your account name and "newpassword" with your new password).

5. Using Third-Party Tools

There are various third-party tools like Offline NT Password & Registry Editor, PCUnlocker, and others that can help reset or remove the password.

macOS

1. Using Apple ID

1. Attempt to log in: After a few failed attempts, you should see a message asking if you want to reset your password with your Apple ID.
2. Follow the prompts: Enter your Apple ID and follow the steps to reset your password.

2. Using Recovery Mode

1. Boot into Recovery Mode:
   • Restart your Mac.
   • Hold down Command + R during startup.
2. Open Terminal:
   • From the menu bar, select Utilities > Terminal.
3. Reset the password:
   • Type resetpassword and press Enter.
   • Follow the prompts to reset your password.

3. Using Another Administrator Account

1. Log in with another account: If there’s another account with administrator privileges, log in with that account.
2. Change the password:
   • Go to System Preferences > Users & Groups.
   • Select the account you need to unlock and click Reset Password.

4. Using Single User Mode

1. Boot into Single User Mode:
   • Restart your Mac.
   • Hold down Command + S during startup.
2. Mount the filesystem: Type /sbin/mount -uw / and press Enter.
3. Remove the setup file: Type rm /var/db/.AppleSetupDone and press Enter.
4. Reboot: Type reboot and press Enter. This will make the system think it’s a new setup and you can create a new admin account.

5. Contact Apple Support

If none of the above methods work, contact Apple Support or visit an Apple Store for assistance.

Remember, unlocking a device without authorization may be illegal in some jurisdictions. Always ensure you have the right to access the device.