list down reasons for spread of virus
Answers
Answer- trojan horse is the ans bro
Answer:
What is a computer virus? Computer viruses are a type of malware that earned their name because of how they spread by "infecting" other files on a disk or computer. Viruses then spread to other disk drives and machines when the infected files are received in downloads from websites, email attachments, shared drives or when carried in files on physical media, such as USB drives or—in the early days—floppy disks.
According to the National Institute of Standards and Technology (NIST), the first computer virus, a boot sector virus called "Brain," was developed in 1986. Tired of customers pirating software from their shop, two brothers claim to have designed the virus to infect the boot sector of software thieves' floppy disks. The virus spread through infected copies of the pirated software, jumping from the infected floppy disk to the computer hard drive when the program was booted, or loaded onto the new machine.