Computer Virus. Software programs written by someone that needs to get a life Can range from being a nuisance to causing major destruction and recovery time Software packages can be infected. Viruses Hide in:.
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Scanner software - “shield” software scans all data coming into a computer system looking for known or suspected viruses. Known viruses are detected by some recognizable “character string” in the virus computer code. Suspected viruses are detected whenever the virus program tries to do something weird, like attach to an existing program or reuse disk space reserved for the operating system.
Cleaner software - can try to restore infected files back to a useable state. Requires booting from a clean, write protected floppy disk May take a lot of time.
Detection software - detects the presence of a virus on an infected disk