How to fix
Bthmodem.sys BSOD
on Windows

Hello. One month ago I started occasionally getting the Bthmodem.sys Blue Screen error on my Windows PC. What causes it and is there a way to get rid of these errors?

A blue screen error[ref en-1] occurs in the Windows operating system. The term "Blue Screen of Death" refers to a serious system error that causes the computer to shut down unexpectedly. BSODs are typically caused by hardware or software issues, and they can have a variety of effects on the system.

When a BSOD occurs, the system displays a blue screen with an error message and information about the error's cause. BSODs can result in data loss, system crashes, and other issues, which can be extremely frustrating for users who rely on their computers for work or other critical tasks.

Typically, the Bthmodem.sys BSOD is caused by a problem with the Bluetooth modem driver.[ref en-2] When a driver becomes outdated, corrupted, or incompatible with the system, this error can occur. Users can try updating or reinstalling the Bluetooth driver or performing a system restore to a previous date when the system was working properly to resolve this error.

Other options include running a virus scan, performing a clean boot, and checking for hardware problems. It should be noted that BSODs can be caused by a variety of factors, and the solution may differ depending on the specific cause of the error. In this guide, you will find 6 steps that should help you fix Bthmodem.sys BSOD in Windows. Follow the step-by-step instructions below.

Solution 1. Fix Corrupted System Files

Use Command Prompt commands to repair system file corruption:

• Open Command Prompt as administrator
• Use the following command and press Enter:
  sfc /scannow

• Reboot your system
• If SFC returned an error, then use the following command lines, pressing Enter after each:
  DISM /Online /Cleanup-Image /CheckHealth
  DISM /Online /Cleanup-Image /ScanHealth
  DISM /Online /Cleanup-Image /RestoreHealth

Solution 2. Update Bluetooth Driver

Outdated drivers could be the cause of this issue. In this case, you can fix it automatically by using [rev id="DriverFix"], which will scan your PC for missing and out-of-date device drivers. Or you can update them manually:

• Open Settings.
• Click on Update & Security.
• Click on Windows Update.
• Click the Check for updates button.
• Click the View optional updates option.
• Click the Driver updates tab.
• Select the driver you want to update.
• Click the Download and install button.

If the View optional updates link is not available after checking for updates, then Windows Update does not have any new drivers or any updates for other products at that particular time.

Solution 3. Perform a Malware Scan

It is possible that a malware infection may be the cause of Bthmodem.sys Blue Screen in Windows. It is important to run a comprehensive security scan to rule out this possibility and ensure that the computer is not infected. This can help to prevent further issues with the Windows operating system and ensure that it is functioning properly.

If you have access to a security scanner, or if your organization pays for one, you can use it to scan your entire system to check for a virus infection. Otherwise, you can use Windows Defender to scan your system:

• Click on the Windows Start menu or press the Windows key on your keyboard.
• Type Microsoft Defender in the search bar and click on Microsoft Defender Antivirus to open the application.
• Click on the Virus & threat protection option in the left-hand menu.
• Click on the Quick scan or Full scan option, depending on your preference.

• If you choose Quick scan, Microsoft Defender Antivirus will scan the most vulnerable and commonly infected areas of your computer.
• If you choose Full scan, Microsoft Defender Antivirus will scan your entire computer, including all files, folders, and programs.
• Click on the Scan now button to start the selected scan type and wait for the scan to complete.
• The time it takes will depend on the size of your hard drive and the number of files being scanned.
• Once the scan is complete, you will be informed of any detected threats, and you can choose to quarantine or remove them.
• If no threats are found, Microsoft Defender Antivirus will inform you that your device is secure.

Solution 4. Restore Default Driver Configuration

• Click on the Start Menu icon.
• In the search bar, type cmd.
• Right-click on the Command Prompt application and select Run as administrator.
• Type the following command:

sc config BTHMODEM start= demand

• Press Enter on your keyboard.
• Restart your PC to apply the changes made.

Solution 5. Use System Restore

System Restore is a feature in Microsoft Windows that allows users to revert their computer's state to a previous point in time. This can be helpful if you have made changes to your system that are causing problems.

• Press the Windows key + R on your keyboard to open the Run box.
• Type SystemPropertiesProtection and press Enter.
• Go to the System Protection tab.

• You will see the System Restore… button. Click it to run System Restore.
• Follow the prompts until you can select a restore point.
• Select the one you want (ideally before the issue started occurring) and go ahead with the process.

Solution 6. Run a System Repair Tool

[d1] is a tool that is designed to diagnose and fix problems with a computer's operating system. It can effectively troubleshoot and repair system errors, BSODs, corrupted files, registry[ref en-3] issues, and other problems that can cause a computer to perform poorly or become unresponsive. Additionally, it can automatically clear cookies and cache which are often the cause of many malfunctions.

To identify and repair problems, the tool performs a scan of the system and replaces or repairs any damaged or corrupted files and other issues that it finds. While many users have reported that it is effective at fixing certain types of computer problems, it is important to note that it is not a guaranteed solution and may not work for all issues.