Hi, if you've removed everything, then any further detections are due to a bug where remediated threats are flagged due to their presence in protection history.
To remove the history of detected items, delete the DetectionHistory folder from:
C:\ProgramData\Microsoft\Windows Defender\Scans\History\Service\DetectionHistory
Note: To see the ProgramData folder and subfolders, make sure you are showing hidden files and folders.
- Windows 10: In File Explorer, select the View tab > check (tick) Hidden items
- Windows 11: In File Explorer, select View > Show > check Hidden items
Restart your computer after deleting the DetectionHistory folder.