If Microsoft Defender Antivirus is configured to detect and remediate threats on your device, Microsoft Defender Antivirus quarantines suspicious files. If you are certain a quarantined file is not a threat, you can restore it.
- Open Windows Security.
- Select Virus & threat protection and then click Protection history.
- In the list of all recent items, filter on Quarantined Items.
- Select an item you want to keep, and take an action, such as restore.
Restoring a file from quarantine can also be done using Command Prompt. See Restore a file from quarantine.