What a hard reset does and when you need one

A hard reset wipes your computer back to factory settings, erasing all your files, programs, and personal data. It is different from a restart — restarting just turns the machine off and back on, while a hard reset removes everything and returns the operating system to the state it came in. You use a hard reset when your computer will not start, runs so slowly it is unusable, has a virus you cannot remove, or you are selling or giving away the machine.

Before you hard reset, understand that you will lose everything on the drive unless you back it up first. Photos, documents, downloaded programs, email — all of it goes. If your computer will not start at all, you may not be able to back anything up, and that is a situation where a hard reset is your only option. If the machine still boots and you have time, back up your files to an external drive or cloud storage before you begin.

Key Takeaways

  • A hard reset erases all files and programs and returns your computer to factory settings, so back up anything you need before starting.
  • On Windows, you access the reset tool through Settings > System > Recovery, and the process takes 30 minutes to several hours depending on your drive speed.
  • On Mac, you restart into Recovery Mode by holding Command and R, then use Erase and Reinstall to wipe and restore the system.
  • If your computer will not start, you may need to use a bootable USB drive or recovery media to begin the reset process.
  • After a hard reset, you will need to set up the operating system again, create a user account, and reinstall your programs.

Hard reset on Windows 10 and Windows 11

On a Windows machine that still boots, the fastest route is the built-in reset tool. Click the Start button, then go to Settings (the gear icon). Select System, then scroll down and click Recovery. You will see an option that says "Reset this PC" — click it. Windows will ask whether you want to keep your files or remove everything. Choose "Remove everything" for a true hard reset.

Windows will then ask whether you want to remove files securely or just delete them quickly. find removal takes longer but makes deleted files harder to recover. For most people, the quick option is fine. The process will restart your computer and begin erasing the drive. Depending on your drive size and speed, this can take anywhere from 30 minutes to several hours. Do not turn off the computer during this time.

When the reset finishes, your computer will restart and show the Windows setup screen, the same one you saw when the machine was brand new. You will need to create a user account, set your language and time zone, and connect to the internet. After that, Windows is clean and ready to use, but you will need to reinstall any programs you want.

Hard reset on Mac

On a Mac, the process is called Erase and Reinstall, and it requires you to restart into Recovery Mode. Shut down your Mac completely. Turn it back on and when ready hold down Command and R at the same time. Keep holding until you see the Apple logo or a spinning globe. This takes you into Recovery Mode, a special version of macOS that runs from your computer's recovery partition.

Once you are in Recovery Mode, you will see the macOS Utilities window. Click Disk Utility, then select your main drive (usually called Macintosh HD) from the list on the left. Click the Erase button at the top. A dialog will appear asking for a name for the drive — you can keep the default or type a new one. Choose APFS as the format (the modern Mac file system) and click Erase. This wipes the drive completely.

After the erase finishes, close Disk Utility and return to the Utilities window. Click "Reinstall macOS" and follow the prompts. Your Mac will read and install a fresh copy of the operating system. This can take an hour or more depending on your internet speed. When it finishes, your Mac will restart and show the setup screen where you create a user account and connect to the internet.

Hard reset when your computer will not start

If your computer will not boot into Windows or macOS at all, you cannot use the built-in reset tools. Instead, you need to create a bootable USB drive on another computer and use that to start the reset process. For Windows, read the Windows Installation Media Creation Tool from Microsoft's website on a working computer. Plug in a blank USB drive (at least 8 GB), run the tool, and follow the prompts to create a bootable Windows drive.

Plug the USB drive into the computer that will not start, restart it, and press the key that opens the boot menu. This key varies by manufacturer — common ones are F12, Esc, or Del — and it usually appears on the screen for a few seconds when you first turn on the computer. Select the USB drive from the boot menu. Windows will start from the USB, and you can then choose "Repair your computer" and access the reset option.

On Mac, the process is simpler because Recovery Mode is built in. Even if your Mac will not start normally, hold Command and R during startup to enter Recovery Mode. From there, use Disk Utility and Reinstall macOS the same way as described above. If Command and R does not work, try Command and Option and R to read and reinstall an older version of macOS, or Command and Shift and R to reinstall the version that came with your Mac.

What to do after the hard reset

Once your computer finishes the reset and restarts, you are back at the setup screen. Create a user account with a strong password — use a mix of uppercase and lowercase letters, numbers, and symbols. Connect to your internet network. Windows and Mac will both check for updates and install them, which can take 15 to 30 minutes. Let this finish before you do anything else.

After setup is complete, your computer is clean but empty. You will need to reinstall any programs you use. If you backed up your files before the reset, you can restore them from your external drive or cloud storage. Do this one folder at a time so you can watch for any problems. If you did not back anything up, those files are gone and cannot be recovered.

When to call a technician instead

A hard reset fixes most software problems, but it will not help if your computer has a hardware failure — a broken hard drive, failing power supply, or damaged motherboard. If your machine will not start and you hear clicking or beeping sounds, or if it starts but when ready shuts down, the problem is likely hardware and a reset will not fix it. In those cases, take the computer to a repair shop.

If you are not comfortable doing a hard reset yourself, or if you are worried about losing data, a technician can do it for you. They can also recover files from a failed drive in some cases, though that is expensive. For most people, following the steps above works fine, but there is no shame in getting help if you are unsure.

Frequently Asked Questions

Will a hard reset remove viruses?

Yes. A hard reset erases everything on the drive, including any malware or viruses. This is one of the most reliable ways to clean an infected computer. After the reset, install antivirus software and keep it updated to avoid reinfection.

Can I undo a hard reset?

No. Once the reset finishes, your files are gone permanently. This is why backing up before you start is so important. If you did not back up and need to recover files, a data recovery service may be able to help, but it is expensive and not always successful.

How long does a hard reset take?

The time varies. On a fast solid-state drive, a reset can finish in 30 to 45 minutes. On a slower mechanical hard drive, it can take several hours. The setup process after the reset adds another 30 minutes to an hour. Plan for at least two hours total.

Do I need the Windows or Mac installation disc?

No. Both Windows and Mac can reset and reinstall themselves without a disc. If your computer will not start, you may need to create a bootable USB drive on another computer, but you do not need to buy or find a physical disc.

What if I forget my password after the reset?

On Windows, you can reset your password using a Microsoft account or a password reset disc if you created one before the reset. On Mac, you can use your Apple ID to reset your password. If you do not have either, you may need to take the computer to an Apple Store or Windows technician.