Malware Definition Analysis

The question describes a piece of code or a programme that enters a computer system secretly and operates without the user's permission or against their will. This is a broad definition for malicious software, commonly known as malware.

Evaluating Malware Options

Let's examine the options provided:

• Virus: A computer virus is a type of malicious code or program written to alter the way a computer operates. A virus operates by inserting or attaching itself to a legitimate program or document that can be executed. Once the virus code runs, it can replicate itself and spread to other computers, often performing harmful actions without the user's immediate knowledge during execution.
• Trojan Horse: This type of malware disguises itself as legitimate software. While it can be loaded without the user's full knowledge of its malicious intent, the primary mechanism is deception during installation or execution, tricking the user into running it.
• Spyware: Spyware is designed to secretly gather information about a user or organization, such as browsing habits or financial details. While installed without knowledge, its main function is surveillance.
• Zeus: This is a specific family of banking Trojan horse malware. It's an example, not a general category matching the primary description.

Identifying the Correct Malware Type

Based on the definition focusing on code loaded without knowledge and running against wishes, a Virus aligns well. Once a user unknowingly executes a file infected by a virus, the virus code runs, often performing actions the user did not intend or consent to at that moment.

Therefore, the programme or piece of code loaded onto a person's computer without their knowledge and runs against their wishes is best described as a type of malware called a Virus.

Correct Answer: Option A - Virus