WiFi can't access internet, only at work

Question

Been dealing with some WiFi issues all morning in an attempt to fix this, but I’m just all out of ideas and the guides are beginning to get very repetitive.

I just purchased an Alienware M17 R2 laptop a couple days ago. It worked great on my home network (5.0). I then went on a trip for work, and it worked great on hotel internet last night. Upon arrival to my work location, I am only able to stay connected for a couple minutes, if at all, when first switching from 2.4 to 5.0 or reverse. The network itself is working well since my phone and co workers laptops are using it just fine.

Occasionally windows 10 troubleshooting will hit me with one of two errors.

The default gateway is not available. (Usually says fixed) This is usually paired with “The connection between your access point, router, or cable modem and the internet is broken.” (This one just says detected)
DNS server not responding (this seems to be rare when number 1 isn’t pegged as the issue)

Things I have tried, in no particular order are:

Resetting the router/modem.
Switching often between 2.4 and 5.0
Updating drivers, both automatically and manually from intels website.
Uninstalling the WiFi cards completely and allowing windows to reinstall it after restart.
Tried limiting to 802.11g
Tethering to my phone (worked fine, albeit slow due to my location)
Another, public wifi in range works fine also (what I'm using to post this).

I am beyond grateful for any help someone could offer, I’m really at my wits end here and really running in circles.

Also, please forgive any typos as this was done from my phone.

A51-06 · Answer

Try checking the DNS server and which port is the laptop connecting on while your doing work. Next is trying to find out wether everyone else’s laptop works normally.

CPTdune · Answer

My old laptop, alienware r4 connected to it just fine. Co-workers are connecting to it just fine as well. It is literally just this new laptop, and this new laptop is having an issue with only this router.

When it connects to the WiFi, it works for 10 seconds or so even, but drops shortly after and just says "no internet connection."

CPTdune · Answer

That is the only server it is saying, but still no outside internet connection.

A51-06 · Answer

I’m sorry don’t do what I said above. go to settings and click the network settings and click network reset or just search network reset in the search bar within the settings app.

A51-06 · Answer

You should try buying a New WiFi Card to see how that one works.

The thing to do before the Buying part is reset the computer with a fresh clean install of windows 10 to verify it’s not a Software Error instead of a HardWare error.

A51-06 · Answer

I can’t see the image you posted. All I see is a yellow triangle.

CPTdune · Answer

This is after the reset as you suggested, it didn't work so I ran the trouble shooter.  This is what it says each time it is ran.

A51-06 · Answer

Your welcome. Try reinstalling the drivers for your network card or try disabling it and re-enable the WiFi card in the device manager.

A51-06 · Answer

He didn’t Update it, he just used the laptop as is from the box.

CPTdune · Answer

It is an image of the Problems Found after running the troubleshooter.

1) The connection between your access point, router, or cable modem and the internet is broken. *Detected*
2) The default gateway is not available. *Fixed*

This was after the reset that you suggested.

Also, I wanted to thank you for all your help, I appreciate someone else input on this a bunch.

InfiniteWisdom · Answer

Did you install/upadte anything  from when it was in working order up to when the issues occurred?

Alienware

WiFi can't access internet, only at work

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