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Adobe Flash is constantly being used as a delivery mechanism for malware. Hackers (malicious programmers) are taking advantage of flaws in the fundamental design of Flash in ways that cannot be anticipated. Like ActiveX, QuickTime, and other browser components, Flash has had its share security vulnerabilities. Experts now believe that Flash has had more total serious vulnerabilities than both ActiveX and Quicktime put together. The problem with Flash is its absence of controls to disable behavior like Web site redirection. End users have no control over what's offered in Flash. There is nothing the end-user can do to avoid the malicious behavior other than disable the Flash plugin. If Flash is installed on your system it can be hijacked.