Scan computer for viruses Updated August 03, 2022 05:40 NEW v3.5 Legacy v15.x ZoneAlarm Free Antivirus + Firewall has 2 types of Antivirus scans that can be performed manually. Critical Scan, scans critical area of the file system and OS. This is a faster scan and can be done more frequently. Full Scan, scans all files and folders including any connected USB storage devices. The Critical Scan can be started from the home screen of ZoneAlarm Free Antivirus + Firewall.Clicking on the Scan button will begin the Critical Scan. The Full Scan can be started by clicking on the Antivirus icon from the home screen of ZoneAlarm Free Antivirus + Firewall. To start the scan click on Full Scan. When either the Critical Scan or Full Scan have began an information window will display what is being scanned, the number of files scanned and a completion bar.If you wish to let the scan continue and close the information window click the Close button. If you need to Pause the scan click on the Pause button. To resume the paused scan click the Green Arrow button.If you want to abort and stop the scan click the Stop button. When a scan has completed you will see the message the Scan Completed Successfully along with the total number of files scanned. To perform a manual Antivirus scan on your PC open ZoneAlarm and click Scan in the upper right corner. Select the type of scan you wish to perform. Quick ScanFastest. Scans only Windows folders, Startup folders, and folders linked to startup items, which are common places for hackers to place viruses. (Programs in these folders can run automatically without permission, which creates the most risk.) Full ScanVery thorough. Scans all files and folders, and scans for rootkits. Skips Archive files. Full Scan with Archive filesVery thorough. Scans all files and folders, and scans for rootkits. Scans contents of zip files. Can take many hours to perform.