Rapid spread of Word macro viruses has helped total virus attacks to double over the last year, leaving more than 40 per cent of networked PCs infected.
The US National Computer Security Association survey of 300 large users, sponsored by software company Cheyenne, found half of all these sites had been infected by the Word macro virus.
Around 45 per cent of these organisations said the virus problem was worse than the year before. The survey covered the year from March 1996 to March 1997.
Nearly 60 per cent of infections still result from an infected floppy disk, however, recently the Internet has been the chief culprit, with 45 per cent of the most recent infections being caused by a donwloaded file or e-mail attachment.
"It is clear that increased full time protection, especially at the desktop is needed," warned the survey.
On the bright side, according to the survey, the ability to cure viruses without turning off the main server meant that the average downtime from a virus attack plummeted from nearly six hours to just 40 minutes.
Geoengineering on the sea floor near glaciers would form a new ice shelf to prevent melting
Alterations in capillary blood flow can be caused by body position change
Curiosity rover is in 'normal mode' but not transmitting scientific data back to base
NatWest outage comes a day after Barclays' IT systems shut out customers and staff