Information about virus.

The CIH virus infects executable files and is spread by executing an infected file. Since many files are executed during normal use of a computer, the CIH virus can infect many files quickly.
There are several variants of the CIH virus. Some activate every month on the 26th, while other variants activate just on April 26th or June 26th. Once the CIH virus activates, the virus attempts to erase the entire hard drive and to overwrite the system BIOS. Some machines may require a new BIOS chip to recover if overwritten by the CIH virus. CIH only affects Win95/98 machines.
More technical details about the CIH virus can be found at the following site.


Go here for more information
http://www.cert.org/incident_notes/IN-99-03.html

Hope this is some good knowledge base for your project.

http://www.virusbtn.com/VirusInformation/cih.html

CIH, also known as Chernobyl or Spacefiller, is a computer virus written by Chen Ing Hau (陳盈豪, pinyin: Chén Yíngháo) of Taiwan. It is considered to be one of the most harmful widely circulated viruses, overwriting critical information on infected system drives, and more importantly, in some cases corrupting the system BIOS.
The name "Chernobyl Virus" was coined some time after the virus was already well-known as CIH, and refers to the complete coincidence of the payload trigger date in some variants of the virus (actually the virus writer's birthday) and the Chernobyl accident, which happened in the Ukrainian SSR on April 26, 1986.

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