While most people avoid opening emails and files from unknown senders, few are aware that seemingly harmless pages can be fitted with malware to attack computers.
It has emerged that malicious codes can be attached to Flash Player technology which is used to display videos on web browsers.
But the aggressive codes can also be attached to text, as Flash Player can be used to display this format as well.
Graham Cluley, a consultant at computer security firm Sophos, has taken the initiative to make people understand the implications of such risks.
Such software can attack the computer of an unsuspecting user and install, and even run, other programs on her or his PC without their knowledge.
Mr Cluley, together with Adobe, the creators of Flash Player, is putting in efforts to create awareness of the situation.
A Google search for the Flash Player can help users check the status of their version of Flash Player. Typing "Adobe Flash version check" will help users find the current update for the software, which can be downloaded from " get.adobe.com/flashplayer".
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