IBM has warned customers in the US that it has sold several thousand Aptiva PCs that have been infected with the CIH virus.
The virus, which triggers on 26 April of any year, is spread from one PC to another when an executable file is transferred and may render an infected PC inoperable on that date.
IBM said that the models affected have serial numbers 240, 301, 520 and 580 and were manufacturer between 5 March and 17 March this year.
According to the company, only US customers have been affected and most have already been contacted about the problem.
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