I am experiencing the same problems with the Lenovo G570 with Atheros 9285. I have yet to try the solutions suggested but it sounds hopeful since I also have Cisco VPN and Virtualbox installed.

Same problem with me. Wireless adaptor not working after upgrade to WIn10.

I am using Idea center B300 with RTL 8192 DE wireless adaptor.

All,

Microsoft has released a solution for this issue.  I see the link to this KB was shared early, so I marked it as the solution.

https://support.microsoft.com/en-us/kb/3084164

Same thing here... Lenovo M5400. Right now, I uninstalled the WLAN from both the device manager and Control Panel / Add or Remove Programs. I am waiting for a Windows 10 driver, because the 8.1 doesn't work. I read somewhere that is does not work because of the CISCO modules. Is it so? Any help apreciatted ;)

Realtek RTL8723BE Wireless LAN 802.11n PCI-E NIC

EDIT: I also have another problem. I uninstalled Synaptics SMbus touchpad from system devices in device manager, and now when I press Fn+F6 the touchpad doesn't get disabled. How can I reinstall it?

I got the same result. I am not familiar with using command promt but I managed to get the 'dni_dne is not installed' too.

I have a Yoga that I've updated from 8.1 - the Yoga doesn't have an ethanet port and I'm being told that there is no networking hardware available. I restored my laptop and download what I thought were the correct adapators  for Realtek from a memory stick but after installing them, no improvement.

I am unaware of having any Cisco software installed. A quick search does not find any either.

Shame, I was looking forward to using W10.

Finally I found solution.

1. Open Device Manager, right-click the Realtek RTL8192DE Wireless LAN device and select Update driver software.
2. Select Browse my computer for driver software.
3. Select Let me pick from a list of device drivers on my computer. 
4. Select the “Qualcomm Atheros AR9285 Wireless Network Adapter” and install.

A windows reset fixed it for me

Did anyone tested to remove Cisco VPN under the Win 10 and then just restart and update network drivers ? Or do I need to go back to 8.1 and remove it first and then upgrade again ?

I've done that 2 times.. all works in Win 8.1 but not W10. So if it solve the issue, I will do this exercise again.