If you're experiencing the Windows XP Notifier plain black desktop background or you're receiving notifications that "This copy of Windows did not pass genuine Windows validation" – then you have either failed Microsoft® Windows® validation or you haven't had a chance to validate your Microsoft Windows software yet. If you have failed validation then you maybe a victim of counterfeit software.

If your computer is running a counterfeit version of Windows XP®, you may be at risk from viruses and malware, which can lead to identity theft. Only with genuine Microsoft software do you get added benefits like upgrades, support and security.

There's a simple way to tell whether or not your Microsoft Windows software is genuine. Click the Validation button and run a free check of your system. If you find out that your software is not genuine, you can take steps to legalise it by following the instructions below.

Read more about genuine software