
While Microsoft Defender is a suitable built-in antivirus for Windows 10 users, you can also use third-party antivirus tools to perform an offline virus scan of your PC. Running an Offline Virus Scan Using Third-Party Antivirus Software Make sure to remove your USB drive or DVD at this point and restore the correct boot order in your BIOS or UEFI settings to ensure that Windows will correctly boot up afterwards. Once the process is finished, your PC will reboot and the malware should be removed.

While Windows 10 allows you to conduct an offline virus scan using Microsoft Defender without any additional tools or hardware, you can also use the older Windows Defender Offline tool on a portable USB drive or DVD to conduct a boot-level scan when Windows can’t (or shouldn’t) boot. Using the Older Windows Defender Offline Tool to Scan for Malware (Older Versions of Windows) At this point, the malware infection should be resolved, but you may need to follow additional steps to repair or restore your Windows installation (depending on the damage).

Any malware will be removed or quarantined based on your actions above.

Once the offline virus scan is complete, your PC will reboot back into Windows.
