A quarter of kids aged between seven and 16 have accidentally downloaded a virus or inadvertently accessed adult content on the web, says Trend Micro.

Research by the security firm as part of this year's What's Your Story study revealed seven and nine-year-olds were the most-likely to do this, with a third of each age group admitting they'd clicked through to inappropriate content.

However, the survey highlighted that older children older children are more likely to accidentally download malicious computer software onto their PCs, with 47 per cent of 14-year-olds and 36 per cent of 15-year-olds claiming they had done so.

Furthermore, 14 percent of seven to 16-year-olds claiming have been a victim of cyber-bullying and the same amount said they had made friends online with someone who was a stranger in real life.

"Keeping children safe online is paramount; from cyber-bullying to viruses and the more publicised risks, it's all about striking the right balance between allowing them to maintain a sense of independence and feeling able to ask for advice," said Rik Ferguson, Director Security Research & Communication EMEA at Trend Micro.