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As you are experiencing issues with Apple and Windows products, this sounds access point related. Wi-Fi routers need adjustments to settings periodically for optimized performance with the constant progression of wireless device technology. This issue could be complex so I would start with adjusting the router settings. Below, I have included two articles. The first article will cover basic Wi-Fi troubleshooting regarding iOS device connection. The second article cover the recommended settings for current Wi-Fi access points.
If the issue persists, you may have to reset the AirPort or you can reach out to us here for additional assistance.