Memory-Resident Scanners

Memory-Resident Scanners: Some antivirus software now comes with a special program that sits in the background while you use your PC and automatically scans for viruses based on different triggers. These programs typically can be configured to automatically scan programs as they are run or scan floppy disks when you issue a shutdown command to the operating . This type of scanner offers increased protection and more chances of catching a virus before it does damage. The price is in performance and convenience; if you set it to scan every program as it is run you have to wait for it to do this before you execute any file, for example.