Use this page to turn on antimalware scanning and set a maximum size for files to be scanned.

Navigation: GUARDIAN > Antimalware > Settings.

Anti-malware settings  
Anti-malware scanning Turns the antimalware scanning on or off.
Max file size to scan The maximum file size to scan in megabytes. The value can be between 1 megabyte and 1024 megabytes (Mbytes). To download files larger than 1024 megabytes (that is, 1 gigabyte) with malware scanning enabled, you might need to create an antimalware policy that never scans files from these sites. Sites that stream audio / video over HTTP might also experience problems when malware scanning is turned on.
File uploads Indicates if uploads are scanned or not.