Internet surfing, USB flash drives and portable drives are the major cause, said the newspaper.More info at The Inq.
Further, 54 per cent of 13,824 sampled have "Internet security problems". The newspaper didn't say whether such problems were anything to do with Microsoft, Yahoo or Google. Over the weekend a foreign committee of the UK House of Commons slated China and these three companies for "immoral collaboration".
75 percent of Chinese PCs infected with viruses?

According to a government department close to 75 percent of computers in China were the target of viruses between May 2005 to May 2006.