Install an antivirus
Common threats to computers nowadays include: * Malware (Viruses, Worms, Trojan Horses) * Hackers * Spam * Phishing
Desktop computers is the common type of computer. Or we can say calculator is the type of computer
Computers became common in homes.
Tablet PC's, not as strong as Personal Computers, but still computers. And of course super computers used for huge calculations which an ordinary PC can't handle. Also a smartphone is sort of a computer.
The noun 'computer' is a singular, common, concrete noun; a word for a thing.
It's a multimedia device which is not common in all computers.
Computers on wheels are special because it enables the computer to be mobile. A computer on wheels is common in hospitals, for example, to move from room to room and ward to ward.
Threats is the plural of the common noun threat, yes.
A computer system is a system of one or more computers and associated software with common storage
Just regular old level 1 computer viruses.
Yes, the compound noun 'computer programmer' is a common noun, a general word for a person who writes programs for the operation of computers.
The L drive on a computer is the student lap accessible drive. It is not common on all computers. If you open the My Computer link, the drive will be mapped as L.