Windows is a Microsoft platform and consequently does not have any official Apple AirPrint software available for it, as of 2015. Some Microsoft programs, such as Office for iPad, do have AirPrint functionality because they are run on an official Apple platform. Windows users can still use AirPrint for their mobile devices by using AirPrint-enabled printers.
Apple AirPrint is a printing solution primarily intended for Apple's mobile devices, such as the iPhone, iPad or iPod touch. By sharing a local wireless network with an AirPrint-enabled printer, these devices can print photos and documents. If you use an iPhone, iPad, iPod touch or Mac computer, there is no driver download or installation necessary for the use of AirPrint, because these devices come boxed with the software included. Though AirPrint is a software that facilitates easy printing via Wi-Fi networks, Mac users can still physically connect a Mac with an AirPrint printer by using a USB or Ethernet port. This can be particularly useful in the event that technical difficulties compromise a user's access to a wireless network.
Many printers are AirPrint-enabled. Find a comprehensive list of printers that support Apple AirPrint at Apple's official AirPrint support Web page. The official list is updated each month by Apple.