Spyware authors may try to deceive users by bundling their spyware with desirable software. PUPs include spyware, adware, and fraudulent dialers. Some versions of the software were described as spyware and adware. This product safeguards against viruses, spyware, malware, and other online attacks. Past versions of RealPlayer have been criticized for containing adware and spyware. SP displays virtual awards for products free of adware, spyware and commercial tie-ins. Such software comes in many forms, such as viruses, Trojan horses, spyware, and worms. Windows Defender is a freeware program designed to protect against spyware and other unwanted software. FBM Software said that the Megaupload toolbar is free of spyware. The installation of spyware frequently involves Internet Explorer. "Spyware" at first denoted "software" meant for espionage purposes. In 2006 StopBadware.org identified Kazaa as a spyware application. Many programmers and some commercial firms have released products dedicated to remove or block spyware. CyanogenMod's developers said that it did not contain spyware or bloatware. Media outlets classified Onavo Protect as spyware.