European Union (EU) data shows that almost one-third of Internet users in the 27-country bloc got a computer virus last year, while 3% lost money through online crime.
The data released today shows that viruses were most prevalent in Bulgaria, where 58% of Internet users were hit in 2010, followed by Hungary, with 47% of users effected.
The safest countries were Austria, where only 14% of users reported a virus, and Ireland, where only 15% got one.
The data also shows that only 14% of households with children had parental controls on their computers and that 5% of adults have found children using inappropriate websites.