CIH virus real but not epidemic
A virus that activates on the 26th day of each month strikes some computers, but its damage is limited.
Executives at Ontrack Data International, which assists people in retrieving lost files, said the Windows 95 CIH virus had hit 500 computers at a single company and clusters of 100 or 200 at other locations.
The Virus can be destroyed with antivirus software currently on the market. Symantec's Norton AntiVirus Kill CIH Tool is one antivirus product that can do this.
All variants of the virus can affect Windows 95 or Windows 98 computers and can potentially destroy the first megabyte of data on a hard drive. This critical area on the hard disk contains data about how the hard drive organizes stored information. If this is tampered with, a hard drive's entire data contents can be effectively wiped out.
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"This month seems to be the most severe," a spokesman for Microsoft said. The software maker urges users to install antivirus software and upgrade it regularly to protect their systems from various viruses.
Although the virus has spread at a rapid rate and infected a large number of systems, the CIH virus is deficient, according to major antivrus firms, in one respect: actual damage.
"It's a perverse way to look at it, but your objective as a virus writer is you want [the virus] to be able to deliver its payload," said Vincent Gullotto, manager of Network Associates McAfee labs.
"Most customers should not be worried," about CIH, said Carey Nachenberg of Symantec, developer of the Norton Antivirus suite. "Macroviruses are a much bigger problem, because of the way people share information. The threat of a CIH virus is much smaller than getting a Word virus."
Reuters contributed to this report.