CIH virus was introduced into China from Taiwan in August 1998. At the same time, the motherboards of some brands, such as Gigabyte and Microstar, will destroy the system program in the Flash BIOS, causing no system response after boot. All data on the hard disk (including partition tables) is corrupted and must be repartitioned to make it possible to save the hard disk. When virus attack, hard disk drive rotates ceaselessly, virus program is unit with 2048 sector, from hard disk main boot area begins to write garbage data to hard disk in turn, until hard disk data is destroyed completely so far. CIH virus mainly infects the executable program of Windows 95/98/Me, and destroys the system program in the Flash BIOS chip of the computer during the attack, causing the motherboard to be damaged and the data in the hard disk to be destroyed at the same time.
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