Qualcomm Atheros AR9485 802./11b/g/n WiFi Adapter Driver version 10.0.0.276 has disappeared, have NO WiFi on my HP Notebook

Hello Marianne,

Thank you for your valuable response.

We noticed that Qualcomm Atheros AR9485 802./11b/g/n WiFi Adapter is not compatible for Microsoft Windows 8.1, for more information on this you refer to the link below.

http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?cc=us&lc=en&dlc=en&softwareitem=ob-105185-1

Hence I suggest you to follow the steps below and uninstall the older version of Wifi Drivers and install the latest Wifi Drivers.

Step 1: Uninstall the Wifi Driver from Device Manager.

1. Press the “Windows Logo + R” key from the desktop to get the Run option.
2. Type devmgmt.msc and press OK.
3. Expand the Network Adapters.
4. Right click on the Wifi Drivers.
5. Click uninstall Driver button.
6. Click on OK button.
7. Restart the computer.

Step 2: Install the latest Wifi Driver.

I suggest you to follow the link below to download and install the latest Qualcomm Atheros QCA9000 Series Wireless LAN Driver for Microsoft Windows 8.1 and check if the issue persist.

http://ftp.hp.com/pub/softpaq/sp65001-65500/sp65428.exe

Do let us know if you need further assistance. We will be happy to help. We, at Microsoft strive towards excellence.

Hello Rahul!

First of all, thank you for answering my questions!

To your questions:

1. The model is HP Pavillion TouchSmart 15-n020us 15.6-Inch Touchscreen Laptop. Do you need more info?
2. I did not make any changes on my computer.
3. Yes, I receive a message "There is no driver installed for this device", meaning HP Qualcomm Atheros Wireless LAN Driver, version 10.0.0.274, Valid operating systems: WIN8, WIN864

And when doing HP diagnostic scan it says "Possible Root Causes>No Network Detected (102)

4. I've ran HP diagnostic scans and it tried to download the Qualcomm Atheros driver, but always failed, then ran a separate Driver Support scans, and was confirmed my Qualcomm Atheros driver was missing. Downloaded the driver, and it's supposed to be up to date now, but nope, it's nowhere to be detected.

Have ran your method 1 with troubleshooting, and it says there's no driver installed for this device.

Have ran your method 2 uninstalling the WiFi driver and ghost drivers (which I found three), rebooted, then updating the driver again at device manager, and it says "Windows has determined the driver software ( Qualcomm Atheros AR9485 802./11b/g/n WiFi Adapter) 

for your device is up to date".

Have ran Windows update as well, and it says everything is up to date. 

I'm lost here, help! What's going on??????????

Oh, and on the Resource Settings it says "This device isn't using any resources because it has a problem", but it doesn't say what kind of problem...

Location: PCI bus 1, device 0, function 0

Hello Marianne,

I can understand the inconvenience caused, be assured that we are here to help you with your concern.

In order to assist you better, kindly confirm on the questions below.

1. What is the exact model of your laptop? HP has more than 300 products contain the term 'pavilion ts 15 notebook pc'.
2. Prior to the issue did you make any changes to the computer?
3. Do you receive any error message when you try to connect to wifi?
4. What scans did you perform to see if the drivers are up to date?

Cause: The Code 10 error is one of several Device Manager Error codes. The Code 10 error will almost always display in the following way: "This device cannot start. (Code 10)".

A Code 10 error is generated when Device Manager can't start the hardware device, a situation usually caused by outdated or corrupted drivers. A device may also receive a Code 10 error if a driver generates an error that Device Manager doesn't understand. In other words, a Code 10 error can sometimes be a very generic message indicating some kind of unspecified driver or hardware problem.

To fix this issue, use the following methods in the order in which they are listed. After each method, check if problem is fixed. If the problem is not fixed, try the next method.

Method 1: Run the Network Adapter Troubleshooter. 

This troubleshooter is an automated Windows 8.1 inbuilt tool which finds and fixes the common issues with the Network Adapter Settings on the computer. It also checks if the network adapter drivers are up to date or not. It may also provide you some clue about the hardware failures happening to the Network Adapter. Perform these steps to run this tool and check if that helps.

1. Press “Windows Logo” + “W” keys to get the Search option.
2. Type “Troubleshooting” in the search bar and press “Enter”.
3. In the “Troubleshooting” window, click on “View All” on the left pane.
4. Click on “Network Adapter”.
5. Click on “Advanced” and then click on “Run as Administrator”.
6. Click “Next” and follow the on-screen instructions to complete the troubleshooting process.

Method 2:

Step 1: Uninstall the Wifi Driver from Device Manager.

1. Press the “Windows Logo + R” key from the desktop to get the Run option.
2. Type devmgmt.msc and press OK.
3. Expand the Network Adapters.
4. Right click on the Wifi Drivers.
5. Click uninstall Driver button.
6. Click on OK button.

Step 2: Uninstall the Ghost Drivers.

Several things can contribute to the addition of ghost devices in the Windows Device Manager.  Some of these include adding or removing hardware.  These "ghost" devices can retain Port, SCSI, Target, and logical unit number (LUN) information that conflict with the active devices being used by Windows.  Under these circumstances, hardware instability can result.

To identify and remove the ghost devices from the Windows Device Manager, do the following:  

1. Press Windows Logo + X keys together and select Device Manager from the List.
2. Then, select View from the drop down and select to Show Hidden Devices.
3. At this point, any ghost devices will be seen with lighter, transparent icon and can be removed.
4. Right-click the ghost device and selecting "Uninstall".
5. Restart the computer and check.

Step 3: Install the latest Wifi Driver from the Manufacturers website.

I suggest you to update the latest Wifi Driver and also other drivers which are failing from manufacturer's website. Please follow the below article to see how you can download and install the latest drivers. 

http://windows.microsoft.com/en-us/windows-8/all-drivers

Additional Information: I suggest you to refer to the link below to see the Fix for: "This device cannot start" Code 10 error in Device Manager in Windows.

https://support.microsoft.com/kb/943104?wa=wsignin1.0

Hope this information is helpful. Please do let us know if you need further assistance, we’ll be glad to assist you.