You should go with Microsoft Defender Antivirus’s Quick Scan to find and clean up malware or viruses from your PC. It is more efficient than a Full Scan as it smartly looks up the locations where you are most likely to find malicious software or infected files. However, a Quick Scan might not be able to find all types of malware. In that case, you can run a Full Scan that scans all folders, files, and running programs on your system.