A study finds that nine out of 10 Internet users have changed the way they use the Internet to protect themselves against threats from spyware and adware programs.

More than 90% of Internet users in the United States have altered their online behavior significantly to counter the threat of spyware programs, according to a study released by the Pew Internet & American Life Project.

Overall, the project's survey found that nine out of 10 Internet users have made at least one change in their online behavior to avoid unwanted software programs.
These behavior changes include not opening e-mail attachments unless they are sure these documents are safe or not visiting specific Web sites that they fear might deposit unwanted programs on their computers.

One quarter of the respondents have stopped using file-sharing programs because of the way unwanted adware programs are bundled into the peer-to-peer applications.
About 20 percent of the respondents said they switched Web browsers to avoid software intrusions.
"After hearing descriptions of 'spyware' and 'adware,' 43 percent of Internet users, or about 59 million American adults, say they have had one of these programs on their home computer," Fox said, noting that the numbers are probably a "conservative estimate" because the survey may have been the first time that respondents had heard definitions of the programs.

"In addition, there are significant gaps between people's perceptions and the reality of what is on their computers, and there is a very strong likelihood that a big portion of those who have had computer problems have been victimized by spyware or more aggressive computer viruses without their knowing the cause of their problems," Fox added.

In the report, Fox draws a clear distinction between spyware and adware, defining spyware as software that is placed secretly on a computer in order to track a users behavior and report back to a central source.

"Spywares reputation is like that of a Peeping Tom or, at worst, a thief. It is almost universally derided and despised. It seems that no user wants to have spyware on her computer and few companies want to be associated with it," she said.

On the other hand, Fox described adware as software that comes bundled as a package with programs that consumers download. In some cases, Internet users check off on a "user agreement" before the download begins, "though our survey shows that in many cases people are not paying much attention to those agreements," she said.

During the survey, Fox discovered that most Internet users think symptoms of spyware are serious problems rather than minor annoyances."Millions of Internet users have firsthand experience with computer problems related to software intrusions, while many express confidence and knowledge of the issues most think more should be done to guard against spyware and to notify people about adware".