Microsoft JScript Runtime Error with error code 800A1391 on Yahoo

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Original title: default_179583-1.js from cdn.fastclick.net - How do I permanently delete this popup in Yahoo?When I open this popup I receive a Microsoft error message everytime for Microsoft JScript runtime error and the same code #800A1391.Norton ran their Power Eraser program yesterday and I don't have any viruses, trojans etc. I also ran Malwarebytes and Super Antispyware before I called Norton.I sent screen prints to Yahoo per their request but now they refuse to reply to my emails and Microsoft wants $99 to help me which I refuse to pay.Yahoo is the only place I have this popup occur - nothing happens in Gmail or my website with GoDaddy.I found cdn.clickfast.net in my registry and deleted it. I haven't found it anyplace else in my computer which is a Dell laptop with Windows Vista Home Premium.I did many Google searches using the popup default name as well as Microsoft's code number and found many, many people who experience the same popup and want to know how to delete it. Unfortunately most of the advise online is that the popup is a virus which it definitely is not. Someone in Yahoo online says it is advertising.Norton feels the problem is with Microsoft because of the Microsoft JScript runtime error message.............white "X" inside a red circle......Windows Script Host and references my C drive and file locationError: 'document' is undefinedCode: 800A1391Source: Microsoft JScript Runtime Error

 

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