Microsoft to start blocking adware that lacks easy uninstall

The company revised the policies for classifying, detecting and handling adware programs in its security software

By Lucian Constantin, IDG News Service |  Security

Microsoft has toughened its criteria for classifying programs as adware and gave developers three months to conform with the new principles or risk having their programs blocked by the company's security products.

The most important change in Microsoft's policy is that adware programs will be blocked by default starting July 1. In the past such programs were allowed to run until users chose one of the recommended actions offered by the company's security software.

Interestingly, Microsoft's crackdown on adware comes as it introduces tools to make it easier for developers to incorporate advertising into Windows 8.1 and Windows Phone apps.

The company has re-evaluated its criteria for classifying applications as adware based on the principle that users should be able to choose and control what happens on their computers, according to Michael Johnson, a member of the Microsoft Malware Protection Center.

First of all, only programs that display ads promoting goods and services inside other programs -- for example, browsers -- will be evaluated as possible unwanted adware applications, Johnson said Thursday in a blog post. "If the program shows advertisements within its own borders it will not be assessed any further."

In order to avoid being flagged as adware and blocked, programs whose revenue model includes advertising must only display ads or groups of ads that have an obvious close button. The ads must also clearly indicate the name of the program that generated them.

Recommended methods for closing the ad include an "X" or the word "close" in a corner; the program name can be specified through phrases like "Ads by ...", "... ads", "Powered by ...", "This ad served by ...", or "This ad is from ...".

"Using abbreviations or company logos alone are not considered clear enough," Johnson said. "Also, only using 'Ads not by this site' does not meet our criteria, because the user does not know which program created the ad."

In addition to following these ad display guidelines, programs need to provide a standard uninstall method in the Windows control panel or the browser add-on management interface, if the program operates as a browser extension or toolbar. The corresponding uninstall entries must contain the same program names as displayed in the generated ads.

"We are very excited by all of these changes," Johnson said. "We believe that it will make it easy for software developers to utilize advertising while at the same time empowering users to control their experience."

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