Anti-virus programs detect computer viruses and __________ your computer system.

Such Trojans as Backdoor, Netbus

and others can delete files, destroy information on the hard drive and open up

a backdoor to your security __________ .

An operating system can be

properly defined as those ___________, which control the resources within a data

processing installation.

Viruses can hide in the ____________ memory where they

wait for a program to be run in order to infect it.

Computer viruses don’t generate

spontaneously; they are written for a specific _________ .

The most important system program

is the _________, which provides special software for using the computer

system.

The operating system manages the

computer’s ______________.

The _________ serves as the fastest

way to spread a virus.

Generally an operating system can

be also defined as a program, which supervises the  ________ of other programs.