This attack could pose a moderate security threat. It does not require immediate action.
This signature detects notification activities between the adware and its controlling server.
Adware.Purityscan is an adware program that downloads and displays advertisements on a computer.
Programs that facilitate delivery of advertising content to the user through their own window, or by utilizing another program's interface. In some cases, these programs may gather information from the user's computer, including information related to Internet browser usage or other computing habits, and relay this information back to a remote computer or other location in cyber-space.
Adware can be downloaded from Web sites (typically in shareware or freeware), email messages, and instant messengers. Additionally, a user may unknowingly receive and/or trigger adware by accepting an End User License Agreement from a software program linked to the adware, or from visiting a Web site that downloads the adware with or without an End User License Agreement.
Use any good Anti-Spyware/Anti-Adware solution to remove the threat from the host. Also visit the Symantec Security Response Web site for more information and removal instructions.