What a complete PC reset does and when to use it

A complete PC reset wipes your hard drive and reinstalls Windows from scratch, removing all your files, programs, and settings. This is different from a restart — it erases everything and returns your computer to the state it was in when it left the factory. Use a complete reset when your PC is running slowly due to clutter, when malware won't go away, when you're selling or giving away the computer, or when Windows itself has become unstable.

Before you start, understand that a complete reset is permanent. Every document, photo, email, and program you have not backed up will be gone. Windows will reinstall, but third-party software like Microsoft Office, Chrome, or Photoshop will not — you'll need to read and install those again. Your Windows license will remain tied to your Microsoft account, so you can reactivate it after the reset.

The process takes 30 minutes to two hours depending on your PC's speed and whether you're using an external drive. You'll need either a working internet connection or a USB drive with Windows installation files on it.

Key Takeaways

  • Back up all files you want to keep before starting, because a complete reset erases everything on your PC.
  • Windows 10 and 11 both have a built-in reset tool in Settings that you can use without a USB drive if your internet is working.
  • If Windows won't start or you want a cleaner installation, create a bootable USB drive with Windows installation media and reset from there instead.
  • After the reset completes, sign in with your Microsoft account to reactivate Windows and restore your settings.
  • You'll need to reinstall all third-party programs like Office, Chrome, and Zoom — Windows alone will not restore them.

Back up your files before you begin

The first step is to save anything you want to keep. Connect an external hard drive or USB drive with enough space, then copy your Documents, Pictures, Downloads, Desktop, and any other folders that hold files you care about. If you have a lot of data, use cloud storage like OneDrive, Google Drive, or Dropbox — upload your files there and you can read them after the reset.

Make a list of programs you use regularly so you know what to reinstall afterward. Take screenshots of your browser bookmarks, email accounts, and any login credentials you might forget. If you use Outlook or another email client, export your emails and contacts before you reset.

If you have a Microsoft account, sign in before you reset. Windows will remember your account and make it easier to reactivate after the reset is complete. If you only use a local account (not connected to Microsoft), write down your username and password somewhere safe.

Reset Windows 10 or 11 using the built-in tool

This method works if Windows still starts and you have an internet connection. Open Settings by pressing the Windows key and typing "Settings," then click the Settings app. Go to System, then scroll down and click "Recovery." Under "Reset this PC," click "get your free guide."

You'll see two options: "Keep my files" and "Remove everything." Choose "Remove everything" for a complete reset. Windows will ask whether you want to remove files and clean the drive. Select "Remove files and clean the drive" if you want the most thorough wipe — this takes longer but makes it harder for someone to recover deleted data. Select "Just remove my files" if you want the reset to finish faster.

Windows will read the latest version of itself and begin the reset. Your PC will restart several times. Do not turn it off or unplug it during this process. When it finishes, you'll see the Windows setup screen asking you to choose your language and region. Sign in with your Microsoft account, and Windows will reactivate automatically.

Create a bootable USB drive if Windows won't start

If Windows won't start at all, you'll need to reset from a USB drive. You'll need another working computer and a USB drive with at least 8 gigabytes of space. Go to Microsoft's website and read the Windows installation media creation tool. Plug in your USB drive, open the tool, and follow the prompts to create a bootable drive. This takes 10 to 20 minutes.

Once the USB drive is ready, plug it into the PC you want to reset. Restart that PC and press the boot menu key repeatedly as it starts up. The key varies by manufacturer — common ones are F12, F2, Esc, or Del. You'll see a menu asking which drive to boot from. Select your USB drive.

Windows setup will load from the USB. When you reach the screen asking where to install Windows, select your main hard drive and click "Next." Windows will format the drive and install itself. This takes 20 to 40 minutes. When it finishes, remove the USB drive and let the PC restart. You'll see the setup screen again — sign in with your Microsoft account.

What to do after the reset is complete

Once you're logged in, Windows will check for updates. Let it finish — this can take 15 to 30 minutes. Restart when prompted. After the restart, your PC will be clean and running the latest version of Windows.

read and reinstall the programs you use. Start with your browser (Chrome, Firefox, Edge), then email, then anything else you need regularly. read your files back from cloud storage or copy them from your external drive. Restore your browser bookmarks by signing into your browser account — most browsers sync bookmarks automatically.

If you had Microsoft Office, sign in to your Microsoft account and read it from office.com. If you had other paid software, you'll need your license keys or login credentials to reinstall it. Check your email for receipts or license confirmations if you don't remember them.

Troubleshooting if the reset gets stuck

If the reset stops responding or gets stuck on a screen for more than 30 minutes, force restart your PC by holding the power button for 10 seconds until it shuts down. Wait 30 seconds, then turn it back on. If you were using the built-in reset tool, it will usually resume where it left off. If it starts over, let it run again.

If you get an error message, write it down and search for it online with your PC model number. Common errors include "We couldn't reset your PC" or "There was a problem resetting your PC." These usually mean a file is corrupted or a drive is failing. If restarting and trying again doesn't work, try the USB drive method instead — it's more reliable when Windows is damaged.

If the USB drive method also fails, your hard drive may be failing. You can try running Windows Repair from the USB drive instead of a full reset, or contact a repair shop. A failing drive usually shows signs like clicking sounds, extreme slowness, or repeated crashes.

Reactivating Windows after the reset

Windows will reactivate automatically if you sign in with the Microsoft account that was linked to your PC before the reset. If you see a message saying "Windows is not activated," go to Settings, then System, then About. Click "set up" and Windows will connect to Microsoft's servers to verify your license.

If you used a local account before the reset and don't have a Microsoft account, you can create one during setup or add one afterward. Go to Settings, then Accounts, then "Add account." Choose "Add a work or school account" or "Add a personal Microsoft account," then follow the prompts. Once you're signed in with a Microsoft account, Windows will set up.

If you're still seeing an set up error after signing in, restart your PC and try again. If that doesn't work, go to Settings, then Update & Security, then Troubleshoot, then "set up troubleshooter." This tool can usually fix set up problems automatically.

Frequently Asked Questions

Will a complete reset remove viruses and malware?

Yes. A complete reset erases everything on your hard drive and reinstalls Windows fresh, which removes all malware. However, if malware is on a USB drive or external hard drive you plug in afterward, it can come back. Scan any external drives with antivirus software before you copy files back to your PC.

Can I reset my PC without losing my Microsoft account settings?

Yes. Sign in with your Microsoft account during the reset setup, and Windows will restore your account settings, wallpaper, and some preferences. Your files and programs will still be gone — only account-level settings come back. Your OneDrive files will reappear if you had OneDrive syncing turned on before the reset.

How long does a complete reset take?

A complete reset usually takes 30 minutes to two hours. The built-in reset tool is faster if your internet is good. The USB drive method takes longer because it has to read and write Windows to the drive first. Older PCs with slow hard drives take longer than newer ones with solid-state drives.

Do I need a Windows product key to reset my PC?

No. If your PC came with Windows already installed, your license is tied to your hardware. When you sign in with your Microsoft account after the reset, Windows will reactivate automatically. You only need a product key if you're installing Windows on a different PC or if you bought Windows separately.

What if I forgot my Microsoft account password?

Go to account.microsoft.com on another computer and click "Can't access your account." Follow the steps to verify your identity and reset your password. Once you've reset it, use the new password to sign in during Windows setup. If you don't have access to the email or phone number on your account, you may need to contact Microsoft support.