Answer:
Y2K - Y2K is a type of macro virus that targets those files that are created using programs such as Word, Excel, etc. Discovered - 1991
CMJ - These viruses install themselves as a part of the operating system.
Trivial.88.D - This is also a type of File infector virus that attacks a file and deletes the information it may contain.
Vienna virus - Is a type of Direct Action Viruses that can be found in the root directory of a hard disk.
Brain Virus - It is a Boot Infector Virus that often attack the master boot record of a hard disk.
Sweeper - It is a malware designed to appear as an anti-virus program. It's also known as 'Rouge'.
Trojan Horse - It imitates the appearance of a regular software and it attacks the computer system by deleting and sometimes re-creating the system files.
Spyware - It is a type of malware that operates to infringe upon the user's privacy.
Worms - It is a malicious program that replicate themselves from one system to another, through a network like worms.
Hope it helps :)
