The survey also suggests that:
Pew's report claims that 68% of US internet users (about 93 million people) have had computer trouble in the past year that is consistent with problems caused spyware and viruses, though 60% of those who had problems were not sure where the problem originated.
Some 25% of internet users have seen new programs on their computers that they did not install or new icons on their desktop "that seemed to come out of nowhere." One in five internet users (18%) have had their homepage inexplicably changed.
The survey was conducted by telephone among a sample of 1,336 internet users.