Which Windows POS Operating Systems are supported by PCI?

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PCI requires that all systems used by parties processing Cardholder Data be patched and supported by their respective vendors. Merchants not using a supported Operating System will not be PCI compliant, and must update to a supported Operating System.

Below is a table of common POS Operating Systems released by Microsoft, and their respective support dates.
 
Operating System Support Status
Windows Embedded for Point of Service (WEPOS) Mainstream support ended on April 12, 2011
Extended support ended on April 12, 2016
Windows Embedded POSReady 2009 Mainstream support ended on April 8, 2014
Extended support ends on April 9, 2019
Windows Embedded POSReady 7 Extended support ends on October 12, 2021
Windows Embedded 8 Industry Support ended on January 12, 2016; must install Windows Embedded 8.1 Industry in order to continue receiving updates and support
Windows Embedded 8.1 Industry Mainstream support ends on July 10, 2018
Extended support ends on July 11, 2023
Windows 10 IoT Enterprise
 
Under Embedded name: Variable (some versions out of support), up to 2019 (mainstream) and 2023 (extended)
Under new IoT name: Mainstream support to at least 2020 and extended 2025
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