Several groups that monitor computer viruses have issued warnings about CIH 1.2, which is known as a "space filler" virus because it works by filling up space on its host computer's hard drive, hiding from anti-virus software by tucking itself into memory reserved for various utility applications. When it strikes, it infects a computer's BIOS or "basic input/output system," a part of the machine so fundamental that a computer affected by CIH 1.2 won't even boot up. According to a Reuters report, most up-to-date antivirus software should be able to stop the virus before it strikes.
The high-tech world braced for a computer virus attack today. The so-called CIH 1.2 virus has been popping up on PCs for some time, and it's set to go into action on April 26, the anniversary of the Chernobyl nuclear disaster.