Unable to connect to home WiFi

Hello. Using a 2012 MacBook Pro runs El Capitan 10.11.4 and unable to connect to Wi Fi home exclusively. We had to Time Warner to get out. They gave us a new modem/router and update the connections/splitter in the basement. All our devices but my laptop can connect to the network. Our iPhones, light fires and Mac Book of wife anything can connect. The mine detects the network but cannot connect. However, I can connect my computer to other networks through my Verizon Wireless hot spot and even a 4 G LTE Kajeet hotspot unit I borrowed from the library. Any ideas what could be going wrong? I ran Wireless Diagnostics and nothing turns upward. The most frustrating part id my computer "thinks" it is online, because the Wifi symbol is obscured. But I'm not connected.

Thank you.

Processor: 2.3 GHz. Intel core i7.

Memory: 4 GB, 1600 MHz, DDR3

If you run any utility, including but not limited to clean my Mac Mac Keeper, Little Snitch, Wireshark, firewalls, etc. you must remove according to developers on their Web sites. Simply by dragging to the trash uninstall these and not help. Also any Mac antivirus application should be withdrawn from the system according to developers, even slide into the basket is ineffective.

Once this is done, see this article

Recommended settings for the WiFi routers and access points - Apple supported

Tags: Notebooks

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