How to Resolve ERROR_THREAD_MODE_NOT_BACKGROUND 401 (0x191) Issue
The Windows system error known as ERROR_THREAD_MODE_NOT_BACKGROUND, identified by code 401 (0x191), often stems from difficulties involving either the operating system or a specific application. The displayed error message states that the thread is not operating in background processing mode.
Before attempting any fixes, ensure you restart your computer, update the relevant application, install the latest Windows updates, and temporarily disable any third-party antivirus programs!
How to Resolve ERROR_THREAD_MODE_NOT_BACKGROUND?
1. Review the Settings of the Problematic Application
This error is frequently linked to the application in use, so your first step should be to inspect its specific settings for any errors or conflicts.
If you’re unsure how to configure the settings correctly, don’t hesitate to reach out to the application’s support team for assistance!
2. Execute the Application in Compatibility Mode
- Right-click the application’s executable file (.exe), then choose Properties.
- Select the Compatibility tab, check the box next to Run this program in compatibility mode for, and pick an earlier version of Windows from the dropdown list.
- Click Apply and then OK to save your modifications. Restart the computer to see if the issue is resolved.
3. Fix Corrupted System Files
- Open Search using Windows + S, type Command Prompt into the search box, and right-click to select Run as administrator.
- When prompted by the UAC, click Yes.
- Individually input the following DISM commands and press Enter after each:
DISM /Online /Cleanup-Image /CheckHealthDISM /Online /Cleanup-Image /ScanHealthDISM /Online /Cleanup-Image /RestoreHealth - Next, execute the SFC scan command:
sfc /scannow
- Lastly, restart your PC to confirm the changes take effect.
Corrupted system files are another common culprit behind the ERROR_THREAD_MODE_NOT_BACKGROUND 401 (0x191) error. To remedy this, utilize DISM (Deployment Image Servicing and Management) and SFC (System File Checker) scans to restore damaged files with their cached versions!
4. Reinstall the Problematic Application
- Press Windows + R to open the Run dialog, type appwiz.cpl, and hit Enter.
- Find the program causing the error in the list, then click Uninstall.
- Follow the on-screen prompts to complete the uninstallation, then restart your computer.
- After that, download and install the application directly from a verified source.
If you’re encountering the ERROR_THREAD_MODE_NOT_BACKGROUND, it’s often because the application didn’t install correctly the first time. Reinstalling should resolve this issue!
If the straightforward uninstallation fails, consider using a highly-rated software removal tool to eradicate all remnants of the previous installation before reinstalling.
5. Initiate a System Restore
- Use Windows + S to open Search, type Create a restore point, and select the appropriate result.
- Click on the System Restore option.
- If available, choose the Choose a different restore point option and then click Next.
- Select the earliest restore point listed and click Next.
- Confirm your selection, click Finish, and then verify that you wish to proceed with the restoration.
If all else fails and the source of the problem remains elusive, a system restore can help you revert all recent changes and bring your computer back to a stable point. Just ensure you select a restore point created prior to the onset of the issue!
One or more of these troubleshooting methods should help resolve the ERROR_THREAD_MODE_NOT_BACKGROUND system error on your Windows device. If the issue persists, contacting the developers of the affected application may be necessary for further assistance.
If you have questions or would like to share which solution worked for you, feel free to leave a comment below.
Leave a Reply