Wanna keep your Windows XP system up-to-date with updates and security patches dedicated for the binary compatible Windows Embedded POSReady 2009 until maybe up to April 2019?
Just add this key to your Windows XP (Home or Professional) registry:
Windows Registry Editor Version 5.00
Warning: Windows XP is end of life already. This notice is only dedicated for educational and research purpose. Usage is on your own risk.
Attention: You may violate your end-user license agreement!