The security warnings she is getting is the infection and is what is stopping their normal security running.
I'd say run a full scan with malwarebytes in safe mode but to do it you'll probably have to download the software on a different computer.... so...
1) download malwarebytes on your computer and once it's downloaded transfer it to a memory stick or a CD.
http://download.cnet....4572.html?tag=mncol;1
2) turn on infected computer and as soon as you've pressed the power button start tapping the F8 key until you see a menu come up (if you see the windows logo you are too late). Select safe mode with networking from the menu.
3) once the computer has started in safe mode install malwarebytes from the CD or usb memory stick, let it update when it's finished installing and then run a full scan (not a quick scan). Remove anything it's found at the end of the scan.
Hopefully you can now restart the computer and all will be well.