Just to add my two cents - I had the same attack yesterday morning.
At first it was very frightening - but on a closer look - it just seemed "fake". It said my computer was being attacked right at that moment.
I re-booted and ran a full scan and CA found and quarantined two files.

I had an email from Slick as well, but I didn't want to respond to her in case it was coming from my computer.

All of this was before you shut down, Karen. I was on Pet Talk, but I was all over the forum - so I cannot pinpoint where I was when it started.

I have run several scans since then and nothing has come up and none of my personal files and data are compromised.

I would love to get a hold of the people that originate this stuff and they would need a lot more than Pet Talk prayers.