Some crowd called Windows Care called me to tell me my computer was infected and that I should go to a website and log on. Said I was busy and could I call them back. They said yes and gave me their number (02 9037 2751).
I called the ACCC instead.
The scam is that they gain access to your computer jiggle it a bit so that it has virus like symptoms then they sell you the program to rid your machine of the "virus" they put on.
And of course they gain have access to your computer...