The Windows 10 May 2021 Update (version 21H1) is a minor update which comes in the form of an enablement package. However, in some cases, you may need to upgrade or reinstall your device from scratch using the latest ISO. Here is how to do this!

➤ GET THE ISO FROM HERE:
✓ https://www.microsoft.com/en-us/software-download/windowsinsiderpreviewiso

HOW TO PERFORM A CLEAN INSTALLATION OF WINDOWS 10
The clean installation process has two parts. First, you have to go through the setup process that allows you to erase the drive, configure partitions, and install a clean copy of Windows 10. The second part is known as the out-of-box experience (OOBE), which is the process that lets you configure personal settings, such as language, account, privacy, and more.

WINDOWS 10 SETUP
Once you have performed the recommended preparation steps and created the USB bootable media, then you can proceed with the steps to complete a clean installation of Windows 10.

WARNING: This is a friendly reminder that this process will erase everything on your computer. It's always recommended to make a temporary full backup of your PC before proceeding.

To do a clean installation of Windows 10, use these steps:
1. Start the computer with the Windows 10 USB media.
2. On prompt, press any key to boot from the device.
3. On the "Windows Setup," click the Next button.
4. Click the Install now button.
5. Type the product key if this is your first time installing Windows 10. If you're reinstalling the OS, you can click the I don't have a product key option to continue (assuming that your device was already activated).
6. Click the Next button.
7. Select the edition of Windows 10 (If applicable).
8. Click the Next button.
9. Select the I accept the license terms option to continue.
10. Click the Next button.
11. Click on the Custom: Install Windows only (Advanced) option.
12. Select the partition with the current installation (usually "Drive 0"), and click the Delete button.
A quick tip: If "Drive 0" has multiple partitions, you have to select and delete each of the partitions to allow the setup to use the entire drive for the new clean installation. Windows 10 will create the required partitions automatically during the process. It's not necessary to delete the partitions on secondary drives.
13. Click the Yes button.
14. Select the empty drive (Drive 0 Unallocated Space).
15. Click the Next button.
Once you complete the steps, the setup will proceed with the fresh installation of Windows 10 on the device.

Windows 10 out-of-box experience
After the installation is complete, continue with the out-of-box experience to create a new account and configure your preferences.

In this guide, I'm installing the version 21H1 (May 2021 Update), but depending on the release that you're installing, the steps may be slightly different.

To complete the OOBE on Windows 10, use these steps:
1. Select your Region.
2. Click the Yes button.
3. Select your keyboard layout.
4. Click the Yes button.
5. Click the Skip button (unless you need to add a second keyboard layout).
6. Click the Set up for personal use option.
7. Click the Next button.
8. Type your Microsoft account information to create an account.
9. Click the Next button.
10. Type your Microsoft account password. Or if you use your phone to sign in to Microsoft services, you can click the Use the Microsoft Authenticator app instead option.
11. Click the Next button.
12. Click the Create PIN button.
13. Create your new four-digit Windows Hello PIN.
A quick tip: If you want to continue using a traditional password, click the Cancel button to skip the process.
14. Click the No button to skip the Office setup (if applicable).
A quick tip: If you have an Office product key, you can click the I have a product key option, and then the apps will install automatically on your device.
15. (Optional) Check the Let Cortana respond to "Hey Cortana" option to use the assistance hands-free.
16. Click the Accept button to allow Microsoft to collect personal information to make Cortana more personal. If you're not interested in this feature, click the Decline button to continue.
17. Select your privacy settings (and don't forget to scroll down the page to review all the available settings).
18. Click the Accept button.

After you complete the steps, the settings you selected will apply to the installation, and the desktop should now appear.

➤ MORE INFORMATION:
✓ https://www.windowscentral.com/how-do-clean-installation-windows-10#clean_install_windows10