As of January 2017, Windows XP desktop market share is 10.34% according to Net Marketshare. These free product key for Windows XP will help to make sure that you are using genuine Windows.When you receive this 25 digit Windows XP product keys, you have to follow a process to activate the windows in your system.
Above is the process how you can use your genuine windows.
If you try to install SP1 and get the following error message: You are dealing with a pirated copy of Windows.
For more information about obtaining a valid product key, see Microsoft Knowledge Base article 326904.
One of the problems i encountered with Windows XP is to change the product key.
The easiest way to do this is to download a tool from microsoft. When Downloaded Follow the instructions on the screen. When you are not able to download this tool, you can also change the product key trough the windows registry.