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Enable verbose logging:
wevtutil set-log Microsoft-Windows-EFS/Debug /e:true
Then replay errors after reproducing the issue using Event Viewer.
If after all steps, efsui.exe still fails to launch or the EFS driver does not encrypt files:
EFS (Encrypted File System) provides per-file encryption on Windows NTFS volumes. Proper installation and configuration improve security, usability, and recoverability.
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\EFS" -Name "EncryptionAlgorithm" -Value 4 -Type DWord
Write-Host "EFS optimized. Reboot recommended." -ForegroundColor Green
Enable verbose logging:
wevtutil set-log Microsoft-Windows-EFS/Debug /e:true
Then replay errors after reproducing the issue using Event Viewer.
If after all steps, efsui.exe still fails to launch or the EFS driver does not encrypt files:
EFS (Encrypted File System) provides per-file encryption on Windows NTFS volumes. Proper installation and configuration improve security, usability, and recoverability.
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\EFS" -Name "EncryptionAlgorithm" -Value 4 -Type DWord
Write-Host "EFS optimized. Reboot recommended." -ForegroundColor Green