Fix: BSOD Error Due to Qcamain10x64.sys (Qualcomm Atheros Driver)

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Many users occasionally encounter critical BSOD (Blue Screen Of Death) errors when using their computer. Most affected users report that the BSODs appear to be random and without detectable triggers. The problem has been confirmed on Windows 7, Windows 8.1 and Windows 10. By looking for clues in the Event Observer to find out why this error occurred, most of the users concerned discovered that Qcamain10x64.sys was somehow responsible for the accident.

A blue screen error (also known as a shutdown error) can occur when a problem causes your system to shut down or restart unexpectedly. If you encounter this type of error, you will not be able to see things like the Start menu or the taskbar on your screen when you turn on your system. Instead, you may see a blue screen indicating that your system has encountered a problem and needs to be restarted.

Remove the defective driver using the Device Manager.

  1. Right-click Start and select Device Manager.
  2. Left-click on Network Adapters to expand this section.
  3. Right-click on your Atheos WiFi adapter and select Uninstall.
  4. Select the “Remove driver software for this device” check box.
  5. Click Next to uninstall.

Once the installation is complete, reinstall the driver and restart it if necessary.

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Install any pending Windows 10 updates (if any).


It turns out that this particular problem can also be caused by a poor Windows security update that is known to cause system instability on Windows 10 computers. Microsoft has now released a patch for this, but if you unfortunately installed this update without the patch, you will get constant BSODs pointing to the file Qcamain10x64.sys.

Several users concerned reported that they had successfully resolved the problem by installing each pending update until the patch was installed. If this problem is caused by a bad Windows security driver in your case, the following steps solve the problem for you.

Perform a Check Disk Run

The BSOD you encounter may be due to errors on your hard drive. You can run the Disk Checker tool integrated into Windows 7 from the command prompt to correct errors.

a) Click on the Start menu and type “cmd”. Right-click on CMD in the result and select Run as administrator.

b) Click Yes when prompted. The command prompt opens.

c) Type “chkdsk c: /f” and press Enter (This means that the system scans the disc on drive C and corrects the error. Here, “C” stands for reader C, which is usually the system reader for many people. If your system drive is not drive C or you want to check other drives, you can change this letter accordingly.)

d) If the system asks you if you want to schedule this check for the next system restart, type “Y” and press Enter.

e) Restart your computer to complete the scan.

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