Win32/caphaw

Hello, over the past couple of days, I've sudden started getting a "security threat" message that says it is malware called Win32/caphaw.  There is a button to "search solutions," and then a message that a solution couldn't be found.  It offers a 1-800 # to call for assistance.  The threat doesn't list any company name.  Has anyone else come across this error.  I'm sure I must have gotten something, but I don't know where from.  I do my best to stay away from questionable websites (especially if Norton comes up with a warning).  But Norton hasn't said anything about it.  So I'm confused if this is a virus of some kind, why wouldn't Norton stop it.  How do I go about getting rid of it?  Any ideas?

Tim.