Windows Embedded POSReady is a windows xp version for point-of-sale machines which will get microsoft support and updates until 2019. So with a registry hack in your normal windows XP you can make Microsoft think you have the Embedded POSReady version and continue to get security updates.
Create the following registry entry and data:
Quote:
[HKEY_LOCAL_MACHINE\SYSTEM\WPA\PosReady]
"Installed"=dword:00000001
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The easiest way to do this is to copy and paste the above in to a notepad file and save it as "something.reg", then double click on the newly created file and agree to let it enter the change in to the registry. After that Windows Action Centre/Windows update should show patches for the next 5 years. I doubt it will 100% keep XP secure but it's the best option for those not upgrading their XP copy.