Master Reset a Computer: Step-by-Step Guide

A master reset on a computer erases personal files, accounts, apps, passwords, and settings, then reinstalls or prepares the operating system. To master reset your computer, use Windows Recovery or macOS Recovery, and expect all data that is not backed up to be permanently lost.

What Does a Master Reset Do?

A master reset, also called a factory reset, returns a computer to a clean operating-system state. Depending on the computer and the reset option selected, it may restore the original factory software or install a fresh copy of the current operating system.

A master reset computer procedure removes the password that is blocking access because it removes the associated user account. It is appropriate when account recovery has failed, the computer is being transferred to another person, or serious software problems cannot be corrected another way.

A reset is not a way to recover files from a locked account. It can also leave certain security protections active. For example, Windows may request a BitLocker recovery key, while a Mac protected by Activation Lock may require the Apple Account previously associated with it.

What Should You Do Before a Master Reset?

Preparing before a master reset can prevent permanent data loss and setup problems. Complete as many of these checks as possible before erasing the computer:

• Copy documents, photos, downloads, browser bookmarks, and other important files to external storage or a cloud account if you can still access them.
• Confirm that synchronized files have finished uploading. A file appearing in a cloud folder does not always mean its upload is complete.
• Locate the BitLocker recovery key for an encrypted Windows computer. It may be stored with the Microsoft account connected to the device or held by an employer or school.
• Have the Microsoft account or Apple Account credentials associated with the computer ready.
• Record any software license or product key that will be needed after reinstalling applications.
• Connect a laptop to power. Do not interrupt the computer while it is erasing data or reinstalling the operating system.
• Disconnect storage devices that should not be erased, unless one is required for recovery.

A master reset is not reversible. Files that exist only on the computer may be impossible to recover after the drive is erased.

How Do You Master Reset a Windows Computer?

If you can sign in to Windows, start the reset from Settings. Menu wording varies slightly between Windows versions.

1. Open Settings.
2. In Windows 11, select System, then Recovery. In Windows 10, select Update & Security, then Recovery.
3. Find the option for resetting the PC and start the reset.
4. Select the option that removes everything. The alternative that keeps personal files is not a complete master reset.
5. Choose a local reinstall or cloud download if Windows presents that choice. A cloud download requires a reliable internet connection.
6. Review the summary carefully. If the computer is leaving your possession, use the additional drive-cleaning option when Windows offers it.
7. Confirm the reset and allow the computer to restart. Do not turn it off during the process.

If a forgotten password prevents sign-in, open Windows Recovery from the sign-in screen:

1. Select the power control on the sign-in screen.
2. Hold the Shift key and select Restart.
3. When the recovery menu appears, select Troubleshoot.
4. Select the option for resetting the PC, then choose to remove everything.
5. Follow the prompts for reinstalling Windows. Enter the BitLocker recovery key if the computer requests it.

If Windows Recovery does not open or reports that recovery files are missing, installation media created on another computer may be required. A device managed by an employer or school should be handled by that organization because its security settings may prevent a personal reset.

How Do You Master Reset a Mac?

On supported recent versions of macOS, System Settings may include an option called Erase All Content and Settings. If you can sign in and that option is available, follow its prompts. Otherwise, erase the Mac through macOS Recovery.

1. Shut down the Mac.
2. On a Mac with Apple silicon, press and hold the power button until startup options appear, then choose Options. On an Intel-based Mac, turn it on and immediately hold Command-R.
3. Enter an administrator password if macOS Recovery requests one.
4. Open Disk Utility from the recovery utilities.
5. Select the internal startup volume, normally named Macintosh HD, and choose Erase. If an option to erase a volume group appears, use it to remove the complete macOS volume group.
6. Quit Disk Utility after erasing finishes.
7. Select Reinstall macOS and follow the prompts. Keep the Mac connected to power and the internet.

If you can sign in before erasing, sign out of the Apple Account and other associated services when the Mac or macOS version requires it. If the Mac remains connected to an Apple Account, setup may display Activation Lock and request that account’s credentials. Account recovery may be necessary if those credentials are forgotten.

What Happens After You Reset a Computer?

After a master reset, the computer starts its initial setup process. Select the correct region, keyboard, network, and account options. Create a new password that is memorable but difficult for someone else to guess, and store a recovery method in a safe place.

1. Finish Windows or macOS setup.
2. Install all operating-system and security updates. Several restarts may be required.
3. Reinstall only the applications you recognize and still need.
4. Restore backed-up files after confirming that the computer works normally.
5. Check that important documents open and that cloud synchronization is using the intended account.

Do not restore unknown system files or applications that may have caused the original problem. If the computer is going to another person, stop at the welcome or setup screen instead of creating an account for them.

What If a Master Reset Is Not the Right Fix?

A full wipe is unnecessary when only an online account password has been forgotten. Use Microsoft account recovery for a Windows sign-in connected to Microsoft, or Apple Account recovery for a Mac sign-in or Activation Lock issue. A local Windows account may offer security questions or another administrator account that can change its password.

Do not reset a computer when the files on it are more important than regaining immediate access. Ask the device manufacturer, Microsoft Support, Apple Support, or the organization that manages the computer about recovery options first. Support cannot normally bypass encryption or ownership protections, but it can explain the approved recovery process and identify any proof of ownership that may be required.