Teefer.sys is one of the Blue Screen of Death errors that appears randomly on Windows 10.
Usually, this error appears while playing games, surfing the Internet, or during video streaming.
Blue Screen of Death errors usually appear due to hardware problems, and Teefer.sys error is no exception.
- The teefer.sys blue screen error appears when your computer has hardware problems.
- The updated drivers can solve the problem, so it’s recommended to use a reliable solution.
- Updating the BIOS can fix the teefer.sys error, so you should proceed with caution.
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Check for hardware errors
- The Teefer.sys error can also be caused by hardware. If hardware is faulty, a Blue Screen of Death (BSOD) error will occur. So try to check for hardware issues first.
- Remove any external devices
- Some Teefer.sys BSOD errors occur due to external devices. So, remove any external device connected to the system. For example, try to remove the mouse and the keyboard.
- Update the BIOS
- If your system’s BIOS is outdated, try updating the BIOS.
Run SFC and DISM scans
- To run SFC scans, open Run with the Windows key + R hotkey.
- Input sfc/scannow in Run and click OK.
- Then, click Scan on the right of the SFC window.
- Press the OK button if the scan finishes.
- Otherwise, click the View scan results button to open the window shown directly below.
- Click Repair All button to fix the detected issues.
- Then, press the OK button.
- If the laptop’s hard drive has crashed, the Teefer.sys BSOD error might be due to hardware issues.
- Check if the laptop has a hard drive, and if it’s a SATA hard drive, try to replace the drive with a new one.
- If the laptop has a solid state drive, then replace the SSD with a new one.
- If replacing the hard drive or SSD resolves the error, then it might be hardware-related.
- Try to update the BIOS
- If the laptop still exhibits the Teefer.sys BSOD error, then try to update the BIOS.
- Head over to the laptop manufacturer’s website, and search for the BIOS update.
- Download and install the BIOS update.
- Reboot the laptop after the update is done.
- If the Teefer.sys BSOD error is resolved after updating the BIOS, then it might be due to an outdated BIOS.
- Remove the driver
- If the error comes due to a driver issue, then it might be due to an outdated driver.
- Open the Device Manager.
- Expand the Display adapters option.
- Right-click on the driver option and select Uninstall device.
- Wait for the removal process to complete.
- Restart the laptop, and check if the Teefer.sys BSOD error is resolved.