Can't connect to this network HP EliteBook 840 G2 [duplicate]

A little background - I have a Lenovo G50 which was running Windows 8.1 up until a few months back. Then came along the free upgrade to Windows 10. Microsoft updated the laptop OS to Windows 10, and all was fine in the first run.

But, as soon as I shut the laptop down, and powered it back up the next time, it just would not connect to the same Wi-Fi hotspot. This situation continues until today. Every time it's the same message - "Can't connect to this network".

The only way I got around this until now, was to manually reboot the Wi-Fi router, and as soon as the router would come back up, Windows 10 would instantly get connected. I have no idea how/why this worked, but while it did work fine up until sometime back, I can't keep doing this anymore. I share my apartment with a few other guys, and having to disrupt their Internet connectivity every single time I turn on my laptop - is not just a minor convenience anymore (not that they haven't voiced their concerns over this, anyway).

I looked at this No Internet connection after upgrade to Windows 10 question, and tried to check my "advanced adapter options", but it all seemed correct (attaching pictures below).

All other devices [MacBook Air, MacBook Pro, iPhones, iPads, Windows 8.1 (running on a Dell and an HP)] connected to the same Wi-Fi hotspot in this apartment, work just fine.

Solution 1:

I had the below Windows 10 Wi-Fi issue: “Can't connect to this network” while every other wireless devices worked, this newly upgraded Windows 10 did not.

The below helped: In Device Manager, right click on Device → Properties → *Advanced and I disabled 802.11n mode. It may slower on actual wireless N networks, but it resolved the problem for the time being.

Solution 2:

Even after a reboot, I found "can't connect to this network" error.

To resolve: open Device Manager (devmgmt.msc), locate the wireless network adapter, disable and then re-enable. Wireless connected back up immediately after doing so.

Solution 3:

Log into your router and change the network name. I have fixed this issue on multiple laptops by doing this. It seems to simple, and like this it should have no bearing on connectivity, but it does.