Only IOS Devices can connect to our wireless network

OK, have a strange one, that I am hoping someone has seen before and can give me some advice.

Have a small network with a Cisco router coming from a TWC modem. A couple of switches and Wireless access points off of the router.

Problem just started on Friday, worked fine for over a year before.

Any IOS (iphone, Ipad, etc.) can connect to any of the WAPs, but nothing else (desktops, laptops, android phones, printers, etc.) can connect.
They say they connect to the network, but there is no internet access.

Any thoughts?

Thanks.. Chris