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Yahoo! Assistant, formerly named 3721 Internet Assistant, is a Browser Helper Object for Internet Explorer developed by Beijing 3721 Technology Co. Ltd, and was renamed to Yahoo! Assistant after Beijing 3721 Technology was acquired by Yahoo!.

3721 Internet Assistant, together with 3721 Chinese Keywords, are known as Spyware by Microsoft AntiSpyware, and malware or browser hijacker by some others, such as Panda Antivirus.

Distribution

3721 Internet Assistant was originally released as a normal client-server application. Spyware Blocker - Protect your PC from thousands of potential spyware, adware,
trojans, keyloggers, spybots and tracking threats. However, it turned to use ActiveX technology to install itself on a client system later and was also shipped with many sharewares as default install options. 3721 Internet Assistant was also blamed for its use of a flaw in Microsoft Internet Explorer to install itself automatically when a user is browsing an array of 3721 sponsored personal and commercial websites with Microsoft Internet Explorer. Yahoo! Assistant is also included in 3721 Chinese Keywords and Yahoo! Mail Express, but sometimes the whole package of Internet Assistant, Chinese Keywords and Mail Express is named "Yahoo! Assistant" in some sharewares.

Features

3721 claims 3721 Internet Assistant includes a lot of useful features, such as IE setting repair, security shield, removal of internet history information and blocking ads. Pop-Up Stopper Anti-Spyware. However, it installs various windows hooks that will slow down the system, and tries to install the hooks repeatedly. Some users also reported that Internet Assistant buttons reappeared immediately after their manual removal using Internet Explorer customization features, and Blue Screen of Death appeared when using Internet Assistant.

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