Its actually pretty easy to get an app, software, or browser plugin mistakenly classified as a virus or malware.
Family computers (ones shared by several people) can result in this form of mistaken identity. For example, I’m a founder of a company called We-Care.com which has a browser plugin for IE, Firefox and Chrome. In addition to the ASPCA and other causes like Clean Water Action distributing the plugins directly, We-Care.com also convinces some software publishers to offer the plugin as an optional… YES OPTIONAL part of their software install.
So, what happens, one family member sees that the We-Care plugin, costs nothing, generates revenue for a cause (example) and is a great way to give back, FREE. But because the We-Care software announces every time a cause it being supported other family members get freaked out and think the computer got infected.
When you’ve got millions of installs out there, it’s easy for a few people to get mislead.