“If the virus that infected your computer deleted one or more of your files, and you don’t have copies of those files elsewhere, they may be irretrievably gone”

“data files aren’t executable, and viruses have to be executed. It’s safest to say that viruses hide only in executable program files.”

“A “better” biological virus — like a computer virus — will perhaps just make its host sick, but still well enough to keep spreading the virus”

“The people who wrote viruses knew they had to stay one step ahead; they developed ways to make their viruses more difficult to detect.”

“Viruses don’t just happen; people write them deliberately.”

“The antivirus program will not wake up your computer if it isn’t running — but if it’s already running, then it doesn’t need to be awakened.”

“Check, double-check, and triple-check that you’re deleting the correct branch! This is very dangerousterritory!”