1. You notice that your computer is getting slower each day. You have terminated unneeded programs, disabled unneeded services, and have recently defragmented the disks. Your computer has plenty of memory but it still seems slow. Since it only started getting slow within the last two weeks—you suspect malware. You have carefully examined each of the programs running but there are no unusual programs. However, you do notice that there is a substantial disk activity, even when no programs are running that should be using the disk. What kind of malware do you think is present in your computer?

Torgan Horse

Explanation:

Torgan Horse is a program downloaded and installed on a computer that appears harmless. Unusual changes to programs files , mysterious messages,disabling of malware and antivirus, unrecognizable programs will be running in the task manger and changes in computer settings are an indication of torgan horse.

Torgan horse frequently appears as legitimate business files ,they are often hard to find and destroy with conventional virus and malware scanner. You can only notice a portion of your disk is been occupied by an unknown program, with substantial disk activities in the task bar with no program running.

In removing a torgan horse recongizing the the infected file is the hardest part Once

the Trojan has been identified, the rest of the process becomes simpler. Users can sometimes find the infected files using the

dynamic link library ( DLL) error which is frequently presented by the computer to signify the presence of a Trojan horse.

Trojan horse

Explanation:

Malicious softwares are unsolicited softwares that is used by attackers as a link to exploit system and network vulnerabilities, to achieve fraudulent objectives.

Examples of malicious softwares or malwares are virus, worm, trojan horse, rootkit, spyware, adware, keylogger etc.

The torjan horse is a malware named after the legendary evasion of Troy by the Greeks. It runs on the background of computer systems unnoticed, slowing down the computer, even after other softwares are uninstalled.

answer; the correct answer is (operating system);