Symantec has admitted that its anti-virus software product has a bug whichcauses it to cry wolf.
The software is unable to tell when a scanned file contains characters that are similar to the Nimda virus, and instead claims the file is infected.
The glitch was first noticed when a client's Symantec InstallShield software claimed that there was a virus in the software of F-Prot, an AV software maker and rival to Symantec.
A furious F-Prot claimed the bug made it look like it had shipped its software with a virus - a major no-no in the AV software industry.
In a statement F-Prot said: "The false alarm was due to a lack of quality assurance on Symantec's part. F-Prot was never infected with Win32.Nimda or any other virus, nor will it ever be. By distributing faulty virus detection equipment files, Symantec has put our good reputation at risk."
A Symantec spokesperson advised its users that the latest software upgrade removes the problem, and has told its customers to update their software straight away.
"There is something in our virus definition set that resulted in the false alarm. It is a rare occurrence and was removed immediately," the spokesperson said.
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