How to Wipe and Reinstall Windows on Your PC

What wiping your PC means and when to do it

Wiping your PC means erasing everything on your hard drive or solid-state drive and reinstalling Windows from scratch. This removes all your files, programs, and settings. You are left with a blank machine running only the operating system, the way it came from the factory.

Most people wipe a PC when it has slowed down from years of accumulated files and programs, when malware has infected it badly enough that antivirus software cannot clean it, or when they are selling or giving away the machine and want to erase their personal data. Wiping is also the fastest way to fix a Windows installation that has become corrupted or unstable.

Before you start, understand that wiping deletes everything. Back up any files you want to keep to an external drive, cloud storage, or another computer. Once you begin the wipe process, those files are gone.

Key Takeaways

Wiping your PC erases all files and programs, then reinstalls Windows, so back up anything you want to keep before you start.
You need a blank USB drive with at least 8 GB of space and a working internet connection to read Windows installation media.
The wipe process takes 20 to 45 minutes depending on your drive speed, and your PC will restart several times during installation.
After Windows reinstalls, you will need to reinstall your programs and restore your backed-up files from external storage.
If your PC will not start at all, you may need to change the boot order in BIOS or UEFI before the wipe can begin.

Gather what you need before starting

You will need a USB flash drive with at least 8 GB of empty space. This becomes your Windows installation media — the tool that holds the Windows files and guides your PC through the wipe and reinstall. A 16 GB drive gives you more room and is safer.

You also need a second computer or device with internet access to read the Windows installation tool. You cannot read it on the PC you are wiping, because you are about to erase that PC's drive. If you only have one computer, use a phone or tablet to read the tool, then transfer the USB drive to your main PC.

Finally, have your Windows product key ready if you have one. If your PC came with Windows pre-installed, the key is usually tied to your Microsoft account or your hardware, and Windows will recognize it automatically during reinstall. If you bought Windows separately, you will see a prompt asking for the key during installation.

read Windows installation media to your USB drive

Go to the Microsoft Windows read page on your second computer. Microsoft offers a free tool called the Windows Installation Media Creation Tool that you can read at no cost. This tool prepares your USB drive with the Windows files.

Plug in your USB drive and run the Media Creation Tool. The tool will ask you to choose your Windows version — Windows 10 or Windows 11, depending on what your PC originally had or what you want to install. If you are not sure, Windows 11 is the current version, but Windows 10 still works and may run better on older hardware.

The tool will format your USB drive, which means it will erase anything on it. Make sure the drive is blank or that you have moved any files off it first. The read and preparation process takes 10 to 20 minutes depending on your internet speed. When it finishes, you will have a bootable USB drive ready to use.

Back up your files and prepare your PC

Connect an external hard drive or USB drive to your PC and copy any files you want to keep. This includes documents, photos, videos, and any other personal data. Do not rely on cloud services alone — have a physical backup as well in case something goes wrong during the wipe.

Write down any program license keys or passwords you will need after the wipe. Some programs, like Microsoft Office or Adobe Creative Suite, require a key to reinstall. Your browser may have saved passwords, but they will be gone after the wipe, so note down any you cannot recover through password reset.

Shut down your PC completely. Do not put it to sleep — turn it off entirely. Unplug any USB devices except the Windows installation media drive you just prepared.

Start your PC from the USB drive and begin the wipe

Plug in your Windows installation USB drive and turn on your PC. As soon as it starts, press the key that opens the boot menu. This key varies by PC manufacturer — common keys are F12, F2, Esc, or Del. You will see a message on the screen for one or two seconds telling you which key to press. If you miss it, restart and try again.

The boot menu shows a list of drives your PC can start from. Select your USB drive from the list. Your PC will load the Windows installation program from the USB drive instead of from your hard drive.

The Windows Setup screen will appear. Click Next to continue. On the next screen, click Repair your computer at the bottom left, then choose Troubleshoot, then Reset this PC. This is the path to a full wipe and reinstall.

Choose your wipe settings and watch the process complete

Windows will ask whether you want to Keep my files or Remove everything. Choose Remove everything to wipe the drive completely. If you choose to keep files, some programs and settings will remain, which defeats the purpose of wiping.

Next, Windows asks whether you want to remove files only or also clean the drive. If you are selling or giving away the PC, choose Remove files and clean the drive — this makes it much harder for someone to recover your deleted data. If you are keeping the PC, removing files only is faster.

Windows will show you a summary of what it is about to do. Review it, then click Reset. The wipe process begins. Your PC will restart several times. Do not turn it off or unplug it — let it run until Windows Setup finishes. This takes 20 to 45 minutes depending on your drive speed and which wipe option you chose.

Complete Windows setup and reinstall your programs

When the wipe and reinstall finish, Windows will ask you to set up your PC as if it were brand new. You will choose your language, region, and keyboard layout. Windows will ask for your Microsoft account email and password. If you do not have a Microsoft account, you can create one or set up a local account instead.

Windows will read and install updates, which may take 10 to 30 minutes. Let this finish — do not restart or shut down your PC. Once updates are done, your desktop will appear with a clean Windows installation.

Now reinstall the programs you use. read them from their official websites or from the Microsoft Store. Reinstall your antivirus software first, before you do anything else online. Then restore your backed-up files from your external drive.

Troubleshooting if your PC will not boot from the USB drive

If pressing the boot menu key does not work, your PC may be set to ignore USB drives. You need to change the boot order in BIOS or UEFI, the firmware that runs before Windows loads. Restart your PC and press the BIOS key instead — usually Del, F2, or F10, depending on your manufacturer. Look for a message on the startup screen telling you which key to press.

Once in BIOS or UEFI, look for a menu called Boot, Boot Order, or Boot Priority. Move your USB drive to the top of the list so it starts first. Save and exit. Your PC will restart and should now load from the USB drive.

If you still cannot get the USB drive to boot, try a different USB port on your PC — some ports may not support booting. If that does not work, the USB drive itself may not have been prepared correctly. Go back to your second computer, rerun the Media Creation Tool, and prepare the drive again.

Frequently Asked Questions

Will wiping my PC remove my Windows license?

No. If Windows came pre-installed on your PC, your license is tied to your hardware or your Microsoft account, and Windows will recognize it automatically during reinstall. If you bought a Windows key separately, you will need to enter it during setup, but the key itself is not erased.

Can I wipe my PC without a USB drive?

Yes, but it is more complicated. Windows has a built-in reset option in Settings under System > Recovery > Reset this PC. However, this method is slower and sometimes fails if Windows is too corrupted. Using a USB drive is more reliable and faster.

What if I need my files after I have already started the wipe?

Once the wipe process begins and you click Reset, your files are being erased and cannot be recovered through normal means. This is why backing up before you start is critical. If you realize too late that you forgot something, stop the process when ready by shutting down your PC, but understand that some data may already be lost.

How long does the entire wipe and reinstall take?

The process usually takes 45 minutes to 2 hours from start to finish, depending on your drive speed, internet connection, and how many Windows updates need to read. Solid-state drives are much faster than older hard drives. Plan for at least an hour and do not interrupt the process.

Do I need to reinstall all my programs after wiping?

Yes. Wiping removes all programs, so you will need to read and install them again from their official sources. This is actually one of the benefits of wiping — you get a fresh start without old, unused programs slowing things down.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.