What are the most common reasons why Windows might fail validation?
There are a few common scenarios why Windows running on a PC might be discovered to be non-genuine during validation. Repairs. You might start to see messages on your desktop that Windows is not genuine after your PC has been repaired. Validation can fail after a repair because some repairs require reinstallation of Windows and during the process, the shop or person repairing your PC used a product key to activate Windows that was different than the one used to activate Windows when it was originally installed. You might not see notifications that Windows isn’t genuine until after you try to download something from the Microsoft Download Center that requires validation, and validation fails. To get genuine, re-enter your original product key to properly activate Windows. For other scenarios, you’ll likely need to buy additional Windows licenses to get genuine. 1 License = 1 PC. Another common cause of Windows validation failure happens when you try to install Windows on more computers
