May I suggest that you run the Latest "Stinger", " McAfee Rootkit Remover", and follow up by running the Latest "Getsusp Tool". Please read the (How to use) on both Stinger/McAfee Rootkit Remover before scanning. I might add in addition, please add your email address under "Preferences" in Getsusp, before scanning.
This Tool detects any Suspicious/Unknown programs. You should recieve a confirmation that any files detected have been submitted to McAfee Labs. Please save the Analysis ID # for future reference. You can also run "Getsusp" while being online.
You can locate these Superb (Free) Tools below my Signature (Second Link)
Wishing you all the Best,
I would also delete all temp files and internet temp files clear the browser caches and see if that helps.
Also best post the artemis number as well