explain this computer viruses i. boot sector, ii. trojan

Computer viruses are malicious software programs that can infect and damage computers and other electronic devices. There are many different types of computer viruses, and they can have a variety of different effects on the infected devices. Some common types of computer viruses include boot sector viruses and trojan viruses.

1. Boot sector viruses: A boot sector virus is a type of computer virus that infects the boot sector of a computer’s hard drive. The boot sector is a special area on the hard drive that contains the instructions and code that are needed to start up the computer. A boot sector virus can infect this area and prevent the computer from starting up properly, or it can cause other problems when the computer is booting up.
2. Trojan viruses: A trojan virus is a type of computer virus that is disguised as a legitimate program or file. Trojan viruses are often spread through email attachments, downloads, or other means, and they can be difficult to detect because they appear to be legitimate. Once a trojan virus is installed on a computer, it can perform a variety of malicious actions, such as stealing data, installing other malware, or disrupting the computer’s operation.