Why are periodic virus scans necessary
by Paragon388 - 8/3/05 8:10 AM
In a recent forum, a CNET editor wrote: "Antivirus software runs in the background from the moment you start your computer or from the moment Windows loads, depending on the software. Every time you run a program or open a file, it is scanned by the antivirus app before it is loaded into the memory."
If the antivirus program is a 24/7 gatekeeper, why is a periodic scan necessary? Won't the 24/7 guarding of the computer prevent a virus from getting through (opening email attachments from an unknown sender aside)?