Sorry for digging up this thread, but I've just come up with a solution for this issue.
Well, the solution was indeed to install HP Wireless Assistant, but that was harder than it should have been. The 3.0 version from my notebook's HP support page didn't want to install due to the error 2753, and the 4.0 version was being blocked by Windows 10, which was 100% sure it's not going to work because "This app can't run on your PC". But I figured out how to get my way around it.
First. run the Wireless Assistant installer in order to extract the files. They'll be available in C:\SwSetup\SP39374\Disk1, unless you stated a different path - go to that folder.
Now, after installing Universal Extractor, start it. Drag the "HPQWA.msi" file from the aforementioned directory right onto the Universal Extractor's window and click OK. In the next window, do not change the extraction method, just proceed with OK.
The Wireless Assistant installer will start, but instead it will immediatelly ask you to restart. Click "No".
Now in the "Disk1" folder you have opened, there should be a new "HPQWA" directory. This is where the program's files are located in, just start "HPWAMain.exe" and the program's icon will appear in the taskbar after a few seconds - just right-click this icon and choose "Turn All Devices On" or "Turn WLAN On". The wireless light shall hopefully change the color from orange to blue, and your wireless connection shall work properly now. Enjoy!
Tested on my HP Pavilion dv6500-series laptop (precisely: dv6610ew) running Windows 10. The issue with the Wi-Fi switch appeared after I upgraded Windows to Creators Update, and the solution above fixed it for good, I believe 🙂
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