For safe and permanent activation, you should use official methods: Product Key : Enter a genuine 25-digit product key purchased from Microsoft Support or an authorized retailer. Activation Troubleshooter
Windows XP is an operating system (OS) developed by Microsoft, released on October 25, 2001. It was a significant upgrade from its predecessor, Windows ME, and was the first Windows OS to be based on the Windows NT kernel. This made Windows XP more stable and secure compared to previous consumer-oriented versions of Windows. ms windows by xpristo