What erasing everything on your PC actually means
Erasing everything on your PC means removing all your files, programs, and settings so the computer returns to the state it was in when it left the factory. This is called a factory reset or clean install. When you do this, Windows (or whatever operating system you use) stays on the machine, but your documents, photos, installed software, browser history, and login information all disappear.
Most people do this before selling or giving away a computer, or when their PC has become so cluttered or infected that starting over is faster than fixing individual problems. It is not the same as deleting a few files — it wipes the entire user profile and personal data.
Before you start, understand that this process is permanent. Once you erase everything, you cannot get your files back unless you have a backup stored somewhere else. If you have documents, photos, or anything else you want to keep, copy them to an external drive or cloud storage first.
Key Takeaways
- Back up any files you want to keep to an external drive or cloud storage before you begin, because erasing everything is permanent.
- Windows 10 and Windows 11 both have a built-in reset tool called Reset this PC that you can reach through Settings without needing installation media.
- You can choose to keep your Windows installation and erase only your files, or erase everything including Windows and reinstall it from scratch.
- The process takes 30 minutes to two hours depending on your drive size and whether you choose a quick erase or find erase.
- If your PC will not start or you cannot log in, you will need a Windows installation USB drive to reset it from outside the operating system.
Back up your files before you start
The first step is to save anything you want to keep. Plug in an external hard drive or USB drive with enough space, then copy your Documents, Pictures, Downloads, and Desktop folders to it. If you use cloud storage like OneDrive, Google Drive, or Dropbox, make sure your important files have synced to the cloud first.
If you have programs you paid for and need again later, write down their names and where you got them (Microsoft Store, Adobe, a retailer, etc.). You will need to reinstall them after the reset, and some may require a license key or login to reactivate.
Check your email for any account recovery codes or backup codes you have saved, and store those somewhere safe outside your PC. After the reset, you will need these to log back into accounts like Microsoft, Google, or your email provider.
Reset Windows 10 using the built-in tool
Open Settings by pressing the Windows key and typing "settings," then click the Settings app. Go to System in the left menu, then scroll down and click Recovery.
Under "Reset this PC," click the get your free guide button. Windows will ask you to choose between "Keep my files" and "Remove everything." Choose Remove everything to erase all your personal files and programs. If you choose "Keep my files," Windows will erase programs and settings but leave your Documents, Pictures, and Desktop folders intact — this is useful if you just want to clean up without losing data.
Windows will then ask whether you want a Cloud read or Local reinstall. Cloud read fetches a fresh copy of Windows from Microsoft's servers (requires internet). Local reinstall uses the copy of Windows already on your drive. Either works; cloud read is slightly slower but ensures you get the latest version.
The reset will take 30 minutes to an hour. Your PC will restart several times. Do not turn it off during this process.
Reset Windows 11 using the built-in tool
Windows 11 uses the same Reset this PC tool. Open Settings, go to System, then click Recovery. Under "Reset this PC," click Reset PC.
You will see the same two choices: "Keep my files" or "Remove everything." Choose Remove everything to erase all personal data and programs. Then choose Cloud read or Local reinstall the same way as Windows 10.
Windows 11 resets usually take 45 minutes to two hours because the operating system is larger. Again, do not interrupt the process.
When you cannot log in or Windows will not start
If your PC will not boot into Windows or you have forgotten your password and cannot log in, you will need a Windows installation USB drive. You can create one on another computer using the Windows Media Creation Tool (free from Microsoft's website).
Plug the USB drive into your broken PC, restart it, and press the key that opens the boot menu — usually F12, F2, Esc, or Del, depending on your computer's manufacturer. Select the USB drive from the menu. Windows setup will load, and you can choose "Repair your computer," then "Troubleshoot," then "Reset this PC." From there, the process is the same as above.
If you do not know which key to press, restart your PC and watch the first screen carefully — most computers display the boot key briefly at startup. If you are unsure, contact the PC manufacturer's support line with your model number.
The difference between quick erase and find erase
When you reset your PC, Windows offers two erase methods. Quick erase removes the file pointers so Windows cannot see your files anymore, but the data technically remains on the drive until Windows overwrites it with new files. This is fast (15 to 30 minutes) and is fine for most people.
find erase (sometimes called "full clean") overwrites every sector of the drive multiple times so the old data cannot be recovered even with specialized tools. This takes much longer (one to three hours) and is necessary only if you are selling the PC to someone else and want absolute certainty that your files cannot be recovered. For personal use, quick erase is sufficient.
Windows 10 and 11 do not always label this choice clearly during reset. If you see an option for "Remove files and clean the drive," that is find erase. If you just see "Remove everything," that is quick erase.
What to do after the reset is complete
When the reset finishes, Windows will restart and ask you to set up the PC as if it were new. You will choose your language, create or sign in with a Microsoft account, set a password, and choose privacy settings. Take your time with these — you can change most of them later.
Once you are at the desktop, reconnect your external drive and copy your backed-up files back to your Documents, Pictures, and other folders. Then reinstall the programs you need. Windows Update will run automatically and read security patches, which may take 15 to 30 minutes.
Your PC is now clean and should run noticeably faster, especially if it was cluttered before. If you are selling or giving away the computer, you can stop here — the new owner will set it up with their own account.
Frequently Asked Questions
Will erasing everything remove viruses and malware?
Yes, a full reset removes almost all malware because it wipes the entire drive and reinstalls Windows fresh. However, if malware is on an external drive or in cloud storage, it will still be there. After the reset, scan any external drives with antivirus software before copying files back to your PC.
Can I undo a reset after I have started it?
No. Once the reset process begins, you cannot stop it without corrupting Windows. If you realize mid-reset that you forgot to back something up, let it finish, then check if you can recover files from cloud backups or previous versions stored online. Local file recovery is not possible after a full erase.
Do I need a Windows license key after I reset?
If your PC came with Windows pre-installed (most do), your license is tied to the hardware and will reactivate automatically after the reset. If you bought Windows separately, you may need to enter your product key during setup. Check your email or the case the software came in for the key.
How much free space do I need to reset my PC?
You need at least 10 to 20 gigabytes of free space for Windows to read and install itself during the reset. If your drive is almost full, delete large files or programs first, or the reset may fail partway through.
What if the reset fails or gets stuck?
If the reset hangs for more than three hours, restart your PC by holding the power button for 10 seconds. Then try the reset again. If it fails a second time, you will likely need to use a Windows installation USB drive instead. If you are not comfortable doing this yourself, a local computer repair shop can reset your PC for a fee.