Couple of clarifications need to be made here.
First, the Artemis detection "Artemis!89BB18D80A", is a detection name derived from the use of our "Artemis" technology. It's a specially crafted DNS query that checks with our server to see if a file is possibly malicious or not. It's not the name of a particular thread, but simply the text "Artemis!" with a few characters of the file's MD5 hasn appended to it.
So with all the techie stuff out of the way, the detection you are getting is good. And it being quarantined is the only half of the picture. It should also be deleting the file, and placing a copy in the Qtine folder. (we always put any detected file, into the quarantine folder, just in case of false detections)
With that said, you should only be getting this detection once, so it tells me that it's coming back for some reason. Most likely, it's being dropped by another piece of malware that is not yet detected at all. So, we just need to find that sample, and get it submitted to webimmune.net.
There are many tools available for finding files that may be malicious. For now, I'll use what is called "GetSusp" It's a tool we've created that will scan your system, and look for possibly malicious files.
I will PM you a link to the file, and instructions for running it. Along with steps to provide the samples back to me directly.
We'll get you taken care of, just hang in there.
Marking as assumed answered due to age of post