Final answer:
Microsoft has stopped providing support services for Windows XP and Windows 8.
Step-by-step explanation:
Microsoft has stopped providing support services for the following Windows versions:
Support for Windows XP was discontinued on April 8, 2014, while support for Windows 8 ended on January 12, 2016. It's important to note that although support has ended for these versions, they can still be used, but it is recommended to upgrade to a supported version for security and performance reasons.