KMS Activator is a tool that allows users to activate Windows operating systems, including Windows XP Professional, using a KMS host. A KMS host is a server that manages product keys and activates Windows installations. The KMS activator tool communicates with the KMS host to activate the Windows installation.
Disable your firewall and antivirus software to prevent any interference with the activation process.
Select a KMS host from the list provided by the tool. You can choose a public KMS host or enter a custom KMS host address.