Windows XP can be found in some surprising places, including many customized applications where OS updates arent yet available. XP machines are six times more likely to be infected with malware than newer versions of Windows. Getting rid of these threats in your enterprise will take time and a lot of effort, especially if the vendors that originally manufactured the machines are no longer in business. With Windows 10 being offered as a free upgrade for the next year, it might make sense to examine those last bastions of XP-dom and see if you can eradicate them from your businesses.”]
Source: https://securityintelligence.com/the-impact-of-the-end-of-windows-xp-on-your-enterprise/