Microsoft added support for WPA2-Enterprise using IEEE 802.1X (RADIUS) authentication in Windows XP SP2 and newer versions through the following installable patch.
You can find out more about Windows support of this here:
"Wi-Fi Protected Access 2 (WPA2)/Wireless Provisioning Services Information Element"
You can find out how to configure your Meraki APs to do this here
Most questions can be answered by reviewing our documentation, but if you need more help, Cisco Meraki Support is ready to work with you.