Since the 1st of Decmber, I have received an anti-virus alert about a heur.duel extension in my Google Toolbar every time I turn my computer on.
Can someone explain (in lay-mans terms!) what i should do?! I’ve seen other posts about these, suggesting they’re false positives but know nothing about computers and don’t understand!
Windows allows the use of . in file names. So you can get a file with name like picture_of_ naked_girl.jpg.exe.
In the default settings Windows will hide the extension of known file types. As a consequence the user will only see picture_of_ naked_girl.jpg and think it is an image and may want to open it. However it is an .exe file and poof the user gets infected. That’s why it is suspect.
It is best to change that. Go to Control Panel → Folder Options → View → and untick “Hide extension for known file types”.