Is your computer slowing down, are you thinking about selling it, or do you suspect it’s picked up a virus? In any of these cases, wondering how to format a PC is a natural reaction, but a full format isn’t always the first solution to reach for.
Windows 10 and 11 can actually refresh themselves without wiping everything: the built-in reset keeps your documents, and a factory reset sorts out most other cases. The trick is knowing which option fits your situation. That’s what this guide is for — understanding what really separates a reset from a format, getting your machine ready without losing anything, then following each procedure, screen by screen.
Format or Reset: What’s the Difference?
On Windows 10 and Windows 11, the Reset this PC feature reinstalls the system while letting you choose whether to keep your files or remove everything, whereas a full format erases the entire drive before a fresh install of Windows. So a reset suits you when the system is unstable or infected but you want to hold onto your documents, while a format is for when you want to start from scratch or get the computer ready to change hands.
In practice, resetting a PC is quicker and available straight from Windows settings, while formatting needs a bootable USB drive and a clean install. Go with a reset for common software bugs, and a format when persistent errors, a serious infection or a hard drive swap call for a complete reinstall.
Before You Format: The Essential Precautions
Check Whether a Simple Reset Is Enough
In many cases you don’t need to format a PC to get it back in shape: a simple Windows reset is enough to fix slowdowns, freezes or errors caused by corrupted system files. Before you prepare an installation USB, start by trying the “Reset this PC” feature to see whether the problem clears up without wiping the drive completely.
A full format comes into its own in two specific cases: when problems reappear soon after a reset, and when the machine is being passed on — sold or given away. There, wiping the drive is no longer a nice-to-have but a necessity, both to deal with the problem at its root and to stop your personal data leaving with the computer.
Back Up Your Data
Before you format a PC, or even start a reset, always back up your important files to external storage or the cloud. You can copy your documents, photos and projects to an external hard drive, a high-capacity USB drive or an online service like OneDrive, so you can restore them easily after reinstalling.
Take the chance to sort through your data: delete files you no longer need and group the ones worth keeping into clearly named folders. Good organisation makes restoring easier and cuts the copying time, both when backing up and when moving your files back onto the formatted PC.
Managing Licences and Passwords
A format or a reset removes your installed apps, which means you’ll need to reactivate certain paid software afterwards, like the Office suite, professional tools or antivirus programs. Make a point of finding and noting your licences, serial numbers and account logins before you start, so you can enter them again after Windows is installed.
Likewise, make sure your passwords are saved in a secure password manager or exported from your browser. Without this precaution, it can be hard to get back into your online accounts once the PC has been fully reinstalled.
Get Your Reinstall Media Ready
To format a PC and reinstall Windows cleanly, you’ll need a USB drive of at least 8 GB, on which you’ll create installation media using Microsoft’s official tool. Also make sure the PC is compatible with the version of Windows you want to install, and that you have an internet connection to download the necessary files.
If your machine is unstable, it may be safer to prepare this USB drive from another working computer. Finally, check that you have your Windows product key or a digital licence linked to your Microsoft account, which will make activation easier after reinstalling.
How to Reset a PC on Windows 11 / 10 (the Easy Way)
On Windows 11, open Settings using the Start menu or the keyboard shortcut, then select System and Recovery to reach the reset options. In the Recovery options section, click Reset this PC to launch the wizard that walks you through reinstalling the system.
Windows then offers two main choices: Keep my files to reinstall the system without deleting your personal documents, or Remove everything to erase your files, apps and settings before resetting the PC. The first option suits fixing a faulty system without losing your data, while the second is for a factory reset or getting ready to sell.
On Windows 10 the path is similar: open Settings, then Update & Security and Recovery, before selecting Reset this PC. You’ll find the same options to keep or remove your files, and you just follow the on-screen steps to finish.
How to Fully Format a PC (Clean Install via USB)
Create a Windows Installation USB
To format a PC and reinstall Windows 10 or Windows 11, start by creating a bootable USB drive using Microsoft’s Media Creation Tool. Head to the Windows download page, click ‘Download now’ in the section for creating installation media, then run the MediaCreationTool utility.
The wizard asks you to choose the language, edition and architecture of Windows, then to select USB flash drive as the media type. Plug in your drive and pick it from the list. The Windows files are then downloaded and copied to the drive, which comes out bootable and ready for the clean install.
Boot from the USB Drive
Insert the installation USB into the PC you’re formatting, then restart it and open the boot menu or the BIOS/UEFI to set the drive as the main boot device. Depending on the model, a dedicated key such as F12, F8, Esc or Del opens this menu at startup and lets you prioritise booting from the USB.
| Brand | Boot menu | BIOS / UEFI access |
|---|---|---|
| GEEKOM | F7 | Del / Esc |
| Dell | F12 | F2 |
| HP | F9 (or Esc) | F10 |
| Lenovo | F12 | F1 or F2 |
| Asus | F8 | F2 or Del |
| Acer | F12 | F2 |
| MSI | F11 | Del |
| Gigabyte | F12 | Del |
| Microsoft Surface | Volume Down + Power | Volume Up + Power |
⚠️ Keys can vary by model and version. Check your device's manual to confirm.
Once the PC boots from the drive, the Windows installer starts automatically and guides you through the first steps, like choosing the language, time zone and keyboard layout. You can then select the custom install option to get to the hard drive's partition management.
Delete the Partitions and Install Windows
Here we'll quickly walk through installing Windows 11 without too much effort. On the drive selection screen, choose the main drive containing the old Windows installation, then delete the associated partitions to wipe the system completely and free up the space. The installer then automatically creates the new partitions it needs and installs Windows on a clean volume, without keeping any of the previous files or settings.
Once the files have copied and the PC has restarted, follow the initial setup steps: connecting to a network, creating or signing in to a Microsoft account, choosing your privacy settings and installing updates. After that you can reinstall your apps, restore your backed-up data and enjoy a completely clean system.
Format a Secondary Drive (Without Touching Windows)
If you only want to format a secondary drive — a second hard drive or a storage SSD, say — you can do it straight from Windows without reinstalling the system. Open Disk Management, find the volume in question, then right-click and select Format to choose the file system and start erasing the contents.
This doesn't touch the system partition where Windows is installed, but it does delete every file on the secondary drive. So make sure you've backed up any important data before confirming the format, and double-check you've got the right volume to avoid losing anything by accident.
What to Do If Something Goes Wrong During Formatting
The PC Won't Boot Anymore
After a reset or format attempt, the PC sometimes won't boot into Windows properly. If that happens, try to reach the recovery environment by restarting several times in a row or by using an installation USB, then use the startup repair options or roll back to a restore point.
If the built-in recovery environment fails or isn't available, external installation media remains the most reliable way to reinstall Windows and restore a working system — provided the PC's hardware isn't the cause.
The Reset Gets Stuck
On some versions of Windows 11, recent updates can cause the Reset this PC feature to freeze or fail. If it hangs for a long time or throws an error, the fix is often to restart the PC and go straight to a USB installation media for a clean reinstall.
Before trying anything again, back up whatever you still can. It's also worth a look at the known issues for your version of Windows: some recent updates come with their share of documented bugs, and it's better to find out before reinstalling than after.
Windows Won't Install
The classic scenario: the clean install starts, then stops dead on an error message. The cause is usually hardware incompatibility, an unexpected partition style or not enough disk space. For Windows 11, first check the two requirements that trip up the most machines — the TPM 2.0 chip and Secure Boot, both of which need enabling in the BIOS.
If the message points to the disk (an MBR partition style instead of GPT, for example), delete the partitions in question directly from the installer and let it recreate them in the right format. Still stuck? The storage drive itself may be near the end of its life; a check of the drive's health is worth doing before you go any further.
Can't Get Into WinRE
WinRE, the recovery environment, normally launches on its own after two or three interrupted boots, or from Settings by holding Shift as you click Restart. Normally. Because it only takes a few corrupted system files or a botched update for it to stop responding. The workaround is always the same: an installation USB, which gives you access to the repair tools even when nothing else will start.
A tip if you look after several machines: always keep an up-to-date installation drive in a drawer. The day a machine goes down, you can act straight away, without relying on a recovery environment that — of all things — no longer recovers anything.
Conclusion
Formatting isn't a reflex, it's a last resort. In plenty of cases a reset or a factory reset does the job, and saves you hours of reinstalling. If a format really is called for, it all comes down to preparation: backups checked, licences noted, installation media ready before you erase a thing. And if your PC is still sluggish after a full reinstall, software is no longer the problem: the hardware has reached its limits, and a newer mini PC will do more for you than ten formats ever could.
FAQs
Does formatting a PC delete everything?
Yes, on the partitions involved: personal files, programs and the operating system all disappear. You then have to reinstall Windows and recover your data from the backup you made beforehand.
Can I format a PC without losing my files?
Not a format as such, no. What you're after is called 'Reset this PC' with the 'Keep my files' option: Windows is reinstalled, your apps and settings go, but your documents stay put. A backup is still the sensible move, though — you're never safe from something going wrong along the way.
Do I need a USB drive to format a PC?
Not for a simple reset, which you launch from Settings. For a clean install, though — or for a PC that won't boot, or after a drive swap — the USB drive becomes essential.
How do I format a PC that won't boot?
Boot from an installation USB — changing the boot order in the BIOS if you need to — then delete the existing partitions from the installer before reinstalling onto a clean drive. Before it comes to that, try the repair tools on that same drive: sometimes they're enough to get the system back on its feet.
Does formatting a PC make it faster?
Often, yes — when the slowness comes from corrupted system files, software piled up over the years or a cluttered Windows. But a format doesn't make the hardware any younger: on an ageing machine the gain will be limited, and it's a replacement that will make the real difference.
