Qualcomm Wireless Network Adapter
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You have mentioned that your WiFi network adapter disappears randomly and during this issue, the Device Manager shows a yellow exclamation mark on the Qualcomm Atheors Wireless Network Adapter and shows the Error: "This Device cannot find enough free resources that it can use (Code 12)."
This message normally appears, when you install multiple devices on the computer to do the same thing. For example, here you might have 2 different network card installed in the computer. Thus, there would be a conflict between these 2 network-cards over the computer resource that they need to function properly. The scenario can also be if the 2 different devices are assigned to the same I/O (Input\output) ports, the same interrupt, or the same Direct Memory Access channel.
This might also happen if there are any issues with the network card or with their drivers.
Let’s try some troubleshooting steps and check the issue.
Method 1: Try disabling other modems and network adapters that may be conflicting with the Qualcomm Atheors Wireless Network Adapter.
You may try disabling the other modems and network adapters, from the Device Manager, that may be conflicting with the Qualcomm Atheors Wireless Network Adapter and check if the issue persists.
You may follow these steps to open the Device Manager and check the same:
a) Press “Windows Logo” + “X”.
b) Click on “Device Manager”.
c) Search for any conflicting Modems or Network Adapters in the device list
d) If any such device exists, then right click on it and select “Disable” from its context menu.
Method 2: Run the Hardware Troubleshooter
The Hardware Troubleshooter is an automated tool which will check the hardware connected to the computer for any known issues with it and provides the details and on how to fix them. Follow these steps and run the troubleshooter.
a) Press “Windows Logo” + “W” keys from the keyboard.
b) Type “Troubleshooting” in the search bar and press “Enter”.
c) In the “Troubleshooting” window, click on “View All” on the left pane.
d) Click on “Hardware and Devices”.
e) Click on “Advanced” and then click on “Run as Administrator”.
f) Click “Next” and follow the on-screen instructions to complete the troubleshooting process.
If you are using an old device, then its driver would be out-dated. So, it would better to update the device driver for the network adapter and check.
Method 3: Update the Device Driver for the WiFi Network Adapter.
Step 1: Check the Windows updates for any latest driver updates.
After running the troubleshooter, check in Windows updates if any driver updates are available. If so, install the same and check if it helps.
b) Type “Updates” in the search bar and click on “Install optional updates” from the left pane.
c) From the “Windows Update” window, click on “Check for Updates” on the top left corner to receive a fresh list of updates and install all the updates listed there.
Step 2: Try updating from the Device Manager
c) Search for the Sound Card from the device list and right click on it and select “Update Driver Software”.
d) Follow the on-screen instructions and complete the installation of the latest driver.
Still, if you are unable to find an update, then get in touch with the Qualcomm Support and check if there are any updates available and then install it.