Windows Defender Off-Line Scan

Within Windows 10, Windows Defender has an off-line scan option.  Launch Windows Defender and click on the virus icon.

Click on the Advanced Scan link.

Select the Windows Defender Offline scan option, and then click on the Scan Now button.

Click on the Scan Now button within the new dialog box that appears.

After the computer reboots, a dialog box will be displayed showing the status of the scan.

After the scan has completed, the computer should reboot again.