Computer hacking 'costs billions'
Viruses, staff misuse and hacking are blamed in the survey by the Department of Trade & Industry (DTI) and accountancy firm PwC.
Most businesses know there is a problem, PwC said, and virus writing gangs are getting more sophisticated.
The average computer incident costs large companies £120,000 a time.
UK businesses are being exposed to ever-greater threats to their information systems as use of the internet and wider connectivity among companies increases, the government-sponsored survey found.
At the BBC.
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