Posted February 03, 2013
From the wikipedia article:
"Numerous antivirus companies have assessed Alexa's toolbar. Symantec classifies the toolbar as "trackware",[25] while McAfee classifies it as adware, a "Potentially Unwanted Program."[26] McAfee Site Advisor rates the Alexa site as "green", finding "no significant problems" but warning of a "small fraction of downloads ... that some people consider adware or other potentially unwanted programs."[27] Windows Defender has classified the toolbar as malware, considering it a trojan."
"Numerous antivirus companies have assessed Alexa's toolbar. Symantec classifies the toolbar as "trackware",[25] while McAfee classifies it as adware, a "Potentially Unwanted Program."[26] McAfee Site Advisor rates the Alexa site as "green", finding "no significant problems" but warning of a "small fraction of downloads ... that some people consider adware or other potentially unwanted programs."[27] Windows Defender has classified the toolbar as malware, considering it a trojan."