Ok for starters Mcafee virus removal when you need to use them is $90 never ever $400. That sounds as if there is a fake AV on that PC pretending to be Mcafee. Where did she get the support number from the popup and if mcafee support she would have been offerred an SR job number was she and if so what was it?
She not with verizon by chance we mods have seen here some verizon users referred to a third party firm who the posters seem to think are Mcafee and charging them heaps.
Can you PM me her details ie email so I can alert the managers in Mcafee re this sounds very worrying.
If you can run the following
With stinger it needs redownloading each update. With getsusp add her or your email to the preferences.
Please keep me updated I want to get this sorted before more get this
Certianly, I will PM you the details you requested. I do not have most of the details right now but I have left a message with my friend to get back with me with more information.