If the exclusions you have added in the Windows Defender Security center are not working, your files will be quarantined within these folders. Proceed with the steps that are given below to fix the issue Windows defender exclusions not working.

Windows defender exclusions not working
  • Run the System File Checker utility to resolve this issue Windows defender exclusions not working.
  • Press the Windows and R buttons together to launch the Run dialog box.
  • Type cmd in the Search section and hit the Enter key.
  • Enter sfc /scannow in the Command Prompt window and tap Enter.
  • Any corrupted files present on the system will be fixed while the sfc scan is run.
  • Once the scanning process is completed, reboot your computer.
  • Now, type Command Prompt in the Search section next to the Start menu.
  • Right-click on the Command Prompt option and select Run as administrator.
  • Now, type DISM.exe /Online /Cleanup-image /Restorehealth in the Command Prompt window and tap Enter.
  • Once the restoration process is finished, reboot your computer.
  • If you have not yet updated your Windows system, open the Settings window.
  • Select the Update & Security section. Then, click Windows Update in the left panel.
  • Now, click the Check for Updates option and install the updates if available.
  • Reboot your Windows computer and verify if the issue has been resolved.
  • If not, add all the Windows Defender exclusions again.
  • Now, open the Settings app from the Start menu and go to the Update & Security section.
  • Select the Windows Security tab in the left panel.
  • Following that, click Virus & threat protection.
  • Scroll down and select the Manage Settings link under Virus & threat protection settings.
  • Go to the Exclusions section and click the Add or remove exclusions link.
  • Select Add an exclusion and choose the file type.
  • Now, add the required exclusions to fix the error Windows defender exclusions not working.