Windows 7 Wifi Unable to Connect (one device)

I have 4 devices (asus laptop - personal, dell laptop - work, android phone - personal, windows 8 phone - work) that all used to connect to wifi networks without an issue. Both laptops run windows 7. I'm now in temporary housing for a few months with its
own wifi setup. I do not have control of this router. Everything but the dell laptop was able to connect to this network. However, the dell will give me the generic "unable to connect error" when I try to connect and obviously the troubleshooter
doesn't provide any more information than that. Also, my ethernet cables are packed away in storage and I really don't want to buy another one for this temporary period. I've seen a lot of similar issues posted, but none of the solutions posed have worked
for my situation yet.
So the dell has NEVER been able to connect at this location - this is not an issue where it gets booted off the network/has poor connectivity.
I've tried the following which did not work:
1) Manually entering IPv4/Gateway/DNS etc.
2) Sharing the network (protected and unprotected) from my personal laptop
3) Standard restarts, disconnect/reconnects, etc. for all devices and the router
4) Entering all the encryption types (even though I know it is WPA2-Personal, AES)
5) Yes, wifi is enabled on that computer
6) Given that this is a work device, I cannot easily uninstall/reinstall drivers due to security blahblahblah
I would appreciate any advice with this situation.
Thanks!

Hi,
First, please check the following event log log before you try any suggestions.
Microsoft-Windows-WLAN-AutoConfig
It’s under applications and services log.
Based on the current situation, you may perform the following suggestions to check the issue:
1. Update the router firmware and reset the router.
The default settings of Windows 7 should work normally with the wireless router.
2. Set up a new network with WPA2 Encryption.
3. Verify with the WLAN service is started and set to automatic, if the WLAN service is stopped, I would suggest you to start the service and put it to automatic.
4. Follow the steps to start the WLAN service and disable the IP Helper service. (Click on Start, type in services.msc. Select WLAN Autoconfig from the list, Right click properties)
5. Connect to another wireless router for a test.
In addition, Please Use Network troubleshooter event logs to solve network problems
http://windows.microsoft.com/en-us/windows7/use-network-troubleshooter-event-logs-to-solve-network-problems
Hope it helps.
Regards,
Blair Deng
Blair Deng
TechNet Community Support

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