I've never used it myself but you can try using WindizUpdate. It does not work with IE, it's for alternative browsers.
If your using IE you could always disable "genuine advantage" by blocking the plug-in in IE. >>Tools >> Programs >> Manage Add-ons >> Highlight "Windows Genuine Advantage" >> tick the disable radio button. Hit Ok, apply, Ok.
Yes, it is perfectly legal to disable the genuine advantage plugin.