Encountering a Blue Screen of Death (BSOD) error can be a real drag. In this particular scenario, an error message which says, “System_ Thread_ Exception_ Not_ Handled” points towards the Bthhfenum.sys file as the culprit.
What is Bthhfenum.sys, why does this error occur, and what can you do to fix it? Put your mind at ease as you’ll find out all you need to know by the time you get to the end of this article.
How to get rid of System_ Thread_ Exception_ Not_ Handled (bthhfenum.sys) BSOD
To learn how to resolve this Blue Screen of Death error, you first need to know what the associated problematic file is.
What is Bthhfenum.sys?
Bthhfenum.sys, also referred to as the Bluetooth Hands-Free Audio and Call Control HID Enumerator file, is an SYS file developed by Windows Software Developer. It is therefore a vital component of Microsoft® Windows® Operating System.
You might have come across the suggestion to delete SYS files if they lead to BSODs. This idea is erroneous since these are critical system files that contain core Windows and DOS (Disk Operating System) components, such as driver resources and references to DLL (Dynamic Link Library) modules. Removing them can damage the integrity of your operating system and trigger fatal errors and data loss.
SYS files, such as bthhfenum.sys, run in the kernel mode. They have the highest privilege obtainable on the Windows OS.
What causes the bthhfenum.sys error?
There are a number of factors that can bring about the problem. They include:
- Malware
- Outdated firmware
- Outdated or corrupt device drivers
- Hardware faults
- Registry issues
- Failure to perform a Windows update
How to fix ‘System_ Thread_ Exception_ Not_ Handled’ error
The bthhfenum.sys file error message usually reads: “SYSTEM_THREAD_EXCEPTION_NOT_HANDLED”. But you may also get:
- PAGE_FAULT_IN_NONPAGED_AREA
- IRQL_NOT_LESS_EQUAL
- KMODE_EXCEPTION_NOT_HANDLED
- PAGE_FAULT_IN_NONPAGED_AREA
- SYSTEM_ SERVICE_ EXCEPTION
- KERNEL_ DATA_ INPAGE
While attempting to fix this Blue Screen of Death, it is not advisable to try downloading the bthhfenum.sys file from an SYS download website. Doing so can cause further damage to your computer as the file may contain malicious codes or is probably not verified by the developers.
We’ll present you with several troubleshooting steps that should help to restore the health of your computer.
How to Resolve Bthhfenum.sys Blue Screen Error:
- Perform a system restore
- Run an SFC (System File Checker) scan
- Run a virus and malware scan
- Run the CHKDSK command
- Run the Blue Screen troubleshooter
- Repair corrupted entries in the Windows registry
- Reinstall device drivers
- Install Windows updates
To be able to perform these fixes, you have to boot up your computer into Safe Mode with Networking.
Fix 1: Perform a system restore
A restore will take your system files and settings back to a point when your computer didn’t have any issues. This won’t affect your personal files. To do this, you need to have created a restore point before the bthhfenum.sys BSOD occurred.
Follow these easy steps to perform a system restore:
- Go to the Start menu.
- Type Recovery in the search bar and click on the option from the search results.
- In the window that opens, click on Open System Restore.
- You have the option of selecting Recommended Restore; click the Next button and follow the on-screen instructions to complete the process. But you may want to select “Choose a different restore point.” This will give you access to all available restore points so you can pick the one you prefer.
- If you have selected “Choose a different restore point”, click the Next button and mark the checkbox beside “Show more restore points”. Now think back to a time when your computer worked fine and select an item from the list that falls on or before that date.
- Click Next > Finish.
- Click the Yes button when presented with a warning that says, “Once started, System Restore cannot be interrupted. Do you want to continue?” Afterwards, your system will restart and the BSOD should be fixed.
Fix 2: Run an SFC (System File Checker) scan
System File Checker is a built-in Windows utility that scans for and restores corrupt system files. You can run it via Command Prompt with administrator rights.
Here’s how to get it done:
- Go to the Start menu.
- Type CMD in the search box and right-click on Command Prompt from the search results.
- Select Run as administrator.
- Click the Yes button on the UAC (User Account Control) confirmation prompt.
- In the elevated Command Prompt window that opens, type or copy and paste sfc /scannow and press Enter on your keyboard to execute it.
Keep in mind that if you are to type the command, you have to leave a space before “/scannow”. - Wait for the system scan to complete. This might take a while.
- Restart your computer and see if the BSOD error has been resolved.
Fix 3: Run a virus and malware scan
Your PC might be infected with malicious items that have corrupted the bthhfenum.sys file. We recommend you run a full system scan with Auslogics Anti-Malware. The tool is easy to set up and use. It is designed not to interfere with any antivirus solution you may already have on your system. It can also detect and get rid of malware your main antivirus may miss.
Fix 4: Run the CHKDSK command
It is probable that the error you are facing occurred due to a corrupt hard drive. If this is the case, performing a Check disk scan will help resolve it.
Follow these simple steps:
- Go to the Start Menu.
- Type CMD in the search bar.
- Right-click on Command Prompt from the search results and click Run as administrator. Alternatively, you can open Command Prompt with administrator privileges through the WinX menu. To do this, press the Windows logo key + X shortcut on your keyboard. Locate Command Prompt (Admin) from the list and click on it.
- Click the Yes button when the UAC (User Account Control) prompt is displayed
- Type or copy and paste chkdsk /f /r into the window that opens and then press enter to begin the scan
- Press Y if you are presented with a message that says, “Chkdsk cannot run because the volume is in use by another process. Would you like to schedule this volume to be checked next time the system restarts?”
- Close the window and restart your PC.
Fix 5: Run the Blue Screen troubleshooter
You can fix Blue Screen of Death errors on Windows 10 using the built-in troubleshooter. It’s available on Creators Update and later versions.
Follow these simple steps:
- Go to the Start menu and click on Windows Settings.
- Click on Update and Security.
- Click Troubleshoot.
- In the page that opens, you’ll see the “Find and fix other problems” category. Now, click on “Blue Screen” and then click the “Run the troubleshooter” button.
When the process is complete, see if the issue has been fixed.
Fix 6: Repair corrupt entries in the Windows registry
Malware infection can corrupt your registry files. Invalid entries may also be left behind after you’ve uninstalled a program. These can accumulate over time.
The above scenarios are liable to cause problems like the bthhfenum.sys error.
You can fix this by running a scan with a trusted registry cleaner. We recommend you use Auslogics Registry Cleaner for this.
Fix 7: Reinstall device drivers
You may have come across the SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (bthhfenum.sys) error while attempting to launch a game or after you plugged in or unplugged a headset or Bluetooth speaker. If this is the case, it means that the associated drivers, which include your graphics driver and Realtek High Definition Audio and Bluetooth module drivers, are faulty. You can fix the issue by updating or reinstalling them.
To see which drivers have a problem, here’s what you have to do:
- Go to Device Manager by pressing the Windows logo key + X and clicking on the option from the menu.
- In the window that opens, you may find a yellow triangle with an exclamation mark in the middle. This will be displayed right next to the devices that are malfunctioning. Right-click on each one and select Uninstall from the context menu.
- Click Ok when the prompt requesting to confirm the action appears.
- Reboot your computer.
- Go back to Device Manager and click on the Actions tab.
- Select the option that says, “Scan for Hardware changes.”
- When the scan is complete, click Install driver.
After uninstalling the problematic driver, you can also download the latest version from the official website of your device manufacturer.
If all these procedures seem overwhelming, we recommend you get Auslogics Driver Updater to automatically handle missing, corrupt, outdated, or incompatible drivers on your computer. The tool will run a scan to detect any issues and then display a notification. It takes just a click of a button and the latest manufacturer-recommended versions of the drivers will be automatically downloaded and installed.
The tool provides the perfect solution for keeping your device drivers up to date so as to avoid annoying issues, such as the one you are currently facing.
Fix 8: Install Windows updates
The Bthhfenum.sys error can occur if your Windows operating system is outdated. Install all available Windows updates to fix the problem.
Follow these simple steps:
- Go to the Start menu.
- Type Update in the search bar and press Enter.
- In the window that opens, click the Check updates button. If there are available updates, click the Install updates button.
- Restart your PC after the installation is complete.
By the time you’ve attempted these fixes, you should be able to get rid of the bthhfenum.sys Blue Screen of Death error.
We hope this article has helped you in regaining a problem-free PC.
You can leave us a comment in the section below to let us know the fix that worked for you.
Please feel free to share your thoughts if you have any comments, questions, or further suggestions.
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