Windows 10 Activation after clean Format installation

[Slava999]

I just installed windows 10 from USB flash.
When it prompted and asked me if i want to upgrade or do clean installation, i chose Clean, and afterwards, i deleted all the partitions.
Now windows is not activated and the Key on the back of my PC is not working.

[PiterGeek]

A clean install is an operating system (OS) installation that overwrites all other content on the hard disk. Unlike a typical OS upgrade, a clean install removes the current operating system and user files during the installation process.

Before you resolve the Windows 10 won’t activate after reinstall problem, it is important to note the following:

• Windows 10 uses its own unique product key
• Windows 10 builds are pre-keyed so you need not enter a product key as long as you upgraded from an activated older version of Windows
• If you are prompted to enter a product key, click Do this later and give it a few days, Windows 10 will activate automatically
• Activation servers get overwhelmed so give it some time and it’ll activate as long as your upgrade is genuine
• The copy of Windows 10 you download must correspond with the edition of Windows you are upgrading from

Following these tip and see if it helps.

1. Restart your computer and try activating it again.
2. Give it a few days and Windows 10 should automatically activate itself.
3. If prompted to enter a product key after reinstalling Windows 10, select Do this later and Windows will reactivate in a few days, automatically.