Washington, D.C.—The threat of unwanted software programs like spyware and adware is changing the way people use the Internet. Eighty-one percent of Internet users said they have stopped opening e-mail attachments unless they are sure the documents are safe, according to the Pew Internet & American Life Project "Spyware" report published Wednesday. An additional 8% of Internet users volunteered that they have never opened unsafe attachments," according to the report. However, according to the report, most people are confident that they grasp "the major online security concepts." Eighty-eight percent said they "have a good idea what ‘spam’ means" and 78% say they "have a good idea" what ‘firewall’ and ‘spyware’ mean.