how do I delete or remove a quarantined virus from computer

To remove or delete a quarantined virus, use Microsoft Defender’s history/quarantine view and choose Remove for the items you no longer want to keep.

On Windows 10 or later (Windows Security / Microsoft Defender Antivirus):

1. Select Start > Settings > Update & Security > Windows Security > Virus & threat protection.
2. Under Current threats, select Threat history.
3. Under Quarantined threats, select See full history.
4. Review the list of quarantined items.
5. Do one of the following:
   • Select Remove all to permanently delete all quarantined items, or
   • Select individual items, then choose Remove for each one.

On Windows Defender / Endpoint Protection client (older UI):

1. Open Windows Defender or Endpoint Protection from the notification area or Start menu.
2. Go to the History tab.
3. Select Quarantined items, then click View details.
4. For each item, choose Remove (or Remove All to delete everything in quarantine).

Quarantined items are already blocked from running; using Remove permanently deletes them from the computer.

References:

• Antivirus and antimalware software: FAQ
• Endpoint Protection client frequently asked questions