Clean Windows 11 Install from USB: Step-by-Step

When a computer slows down, driver errors pile up, or you simply want to start over with a new disk, the cleanest solution is a fresh install from a USB drive. The "Reset this PC" option is often enough, but it can bring back manufacturer software and old settings; a clean install, on the other hand, rebuilds the disk completely. Below, we list the steps along with common mistakes.

Checklist before you start

During installation, everything on the disk can be erased. That is why preparation matters more than the installation itself.

A USB drive with at least 8 GB of free space: everything on it will be erased, so back it up first.
Another working computer: needed to prepare the installation media.
File backup: Documents, Desktop, Pictures, browser bookmarks, game saves and email archives. Move them to an external disk or cloud storage.
License key: note the key you purchased, and also note the keys for Office and other programs.
Drivers: especially the network driver (Wi-Fi or Ethernet). Save it to another USB drive in advance; if you cannot connect to the internet after installation, things get much harder.
Hardware requirements: for Windows 11, Microsoft requires a compatible 64-bit processor, 4 GB of memory, 64 GB of storage, UEFI and Secure Boot support, and TPM 2.0.

You can check whether your computer is compatible with Microsoft's PC Health Check app or from the Windows Update section in Settings. If TPM is turned off, on most motherboards it can be enabled in the BIOS (it appears as PTT on Intel and fTPM on AMD).

Preparing the installation USB drive

Download the installation media only from Microsoft's own site. "Ready-made" images on third-party sites may have been modified and can cause security problems later.

On Microsoft's Windows 11 download page, find the "Create Windows 11 Installation Media" section and download the tool.
Run the tool and confirm the language and edition options. Usually, the "Use the recommended options for this PC" box is enough.
Choose "USB flash drive" as the media and select your drive from the list.
Wait until the download and preparation finish. Depending on your connection speed, this can take 15 to 45 minutes.

Alternatively, you can download the ISO file from the same page and write it to the drive with a tool such as Rufus. This method gives flexibility to users who know how to handle some requirement checks on older hardware, but running Windows 11 on unsupported hardware carries risks for updates and stability.

Booting from USB via BIOS or UEFI

Insert the prepared drive and restart the computer. During startup, hold down or repeatedly press the boot menu key. The key varies by manufacturer.

Manufacturer	Boot menu	BIOS/UEFI setup
ASUS	F8 or Esc	Del or F2
MSI	F11	Del
Gigabyte	F12	Del
Dell	F12	F2
HP	F9 or Esc	F10
Lenovo	F12	F1 or F2
Acer	F12	F2 or Del

These keys may vary by model and BIOS version; if you are unsure, check the device manual. In the menu, you will see your drive in two forms: by its name directly, and with "UEFI:" at the start. Since Windows 11 uses UEFI, select the entry that starts with UEFI.

Installation steps

When the setup screen appears, proceed in order.

Choose the language, time and keyboard layout (Turkish Q).
Click "Install now".
On the license screen, you can enter your key, or select "I don't have a product key" to activate later. If Windows 10 or 11 was previously activated on the computer, the digital license is tied to the hardware and may be recognized automatically once you connect to the internet.
Select the edition (Home or Pro). Your choice must match your license; a Home key does not unlock Pro.
Select "Custom: Install Windows only (advanced)".
On the disk screen, delete the partitions that hold the old Windows one by one to get "Unallocated space," select it and click Next. Windows creates the required system partitions by itself.
When copying finishes, the computer restarts several times. You do not need to remove the USB drive during this; if you remove it after the first restart, you will not be able to return to the setup screen.

If multiple disks are connected, pay attention to their capacities so you do not erase the wrong one. If you are not sure, physically disconnect the other disks and perform the installation that way.

First setup screens and account settings

After installation, screens for region, keyboard and network selection appear. On Windows 11 Home, signing in with a Microsoft account has become mandatory; if you want to continue with a local account, these methods change over time. On Pro, a domain or work account option is also available. On the privacy screen, turn off location, diagnostic data and advertising ID settings according to your preference.

First things to do after installation

Windows Update: install all updates from Settings and restart several times if needed.
Drivers: get the graphics card, chipset and audio drivers from the manufacturer's site.
Activation: check the status from Settings, System, Activation. If you do not have a license, you can enter a key from here.
Security: keep Windows Security turned on; if you will use a third-party antivirus, make sure it does not conflict with the old one.
Install programs: browser, office applications, backup software. Install them one by one and only from official sites.
Restore from backup: move your files back and create a restore point.

License question: which one fits?

The most frequently asked question in a clean install is how to activate the license. A retail license can be moved to another computer, while an OEM license is generally tied to the first computer. If you are thinking about buying a new key, Windows 10/11 Pro Retail and Windows 10/11 Home Retail are suitable options for those who want portability. Those looking for a more affordable option for a single computer can check Windows 10-11 Pro OEM or Home OEM editions. Those using Home who want Pro features may find the Home to Pro upgrade key sufficient. All of them are listed in the software licenses category. At LisansX, delivery is digital; the key lands in your account after payment and is entered from Settings through the official route.

Common problems during installation

Most installations finish without issues, but the situations below come up often and their solutions are well known.

"This PC can't run Windows 11" warning

This message usually appears when TPM 2.0 or Secure Boot is turned off. Exit the installation, enter the UEFI settings, enable TPM (Intel PTT or AMD fTPM) and turn on Secure Boot. Make sure the disk uses GPT partitioning rather than MBR; older MBR disks do not allow UEFI installation. Do not forget to take a backup before performing any detailed conversion.

Disk not showing during installation

On some new laptops, a storage controller driver is needed for the NVMe disk to appear. Copy the relevant driver (for example, Intel Rapid Storage) from the manufacturer's site to another USB drive and show it with the "Load driver" button on the installation screen. Alternatively, changing the storage mode in the BIOS may work, but keep in mind that doing so can break the startup of an existing installation.

Installation freezes or shows an error

Plug the drive into a different USB port, recreate the installation media and remove all unnecessary devices. If an error code appears, note it down and search for it on Microsoft's support page. Memory (RAM) failure can also cause freezing; if in doubt, test with the Windows Memory Diagnostic tool.

Wrong regional settings after installation

If the time zone or keyboard layout is wrong, add Turkey and Turkish Q from Settings, Time and language. Removing unnecessary keyboard layouts prevents incorrect character input.

When is a clean install necessary, and when is it not?

Not every slowdown requires a clean install. First look at disk usage, startup programs and driver updates. If these do not fix it, a clean install makes sense in the following cases:

The system frequently shows blue screens and the problem is not solved by driver updates.
You are going to sell or hand over the computer.
You installed a new SSD and will set up the operating system on it from scratch.
You want to start safely after a malware infection.
You want to get rid of a system full of manufacturer software that has been neglected for years.

After installation you will also need office applications. For a licensed office suite, you can look at options such as Office 2024 and, once installation is done, complete the update and activation steps through the official method.

A practical backup plan

The most common mistake before installation is assuming that "my important files are in the Documents folder." However, browser profiles, game saves, email archives, desktop shortcuts and program settings in the AppData folder are stored in different places. A systematic plan could look like this: copy your user folders (Documents, Pictures, Desktop, Downloads, Music, Videos) as they are to an external disk. Sync your browser with your account and make sure bookmarks and passwords are saved in the cloud. Keep the license information of the programs you use, and their settings exports, in a separate folder. Finally, open some of the copied files to confirm they are intact; do not erase the disk before you have seen that the backup can be read.

Frequently Asked Questions

Does a clean install erase the license?

No. A license is not a file that gets deleted; it is a record on Microsoft's servers. If you install the same edition on a computer that was previously activated, activation usually happens automatically once you connect to the internet.

Which disk partitions should I delete during installation?

Delete only the partitions the old Windows used. If there is a second disk or partition where your data is stored, do not touch it. If you cannot be sure, physically disconnect that disk during installation.

Why doesn't the USB drive appear in the boot list?

This is usually caused by Secure Boot, CSM or USB support settings. Plug the drive into a different USB port (rear panel; USB 2.0 is preferred) and make sure USB boot is enabled in the UEFI settings.