Generic!atr removal as per http://vil.nai.com/vil/content/v_141387.htm should be achieved by using the latest .DAT and Engine files.
It is possible you may have a secondary infection but it is vital you employ the 5400 Engine and 5915 DAT (today) first if you are not doing so already.
Here, we found it necessary to run the Autrun Eater tool from the link below to "shut down" the processes. I'm not sure it will run on the server but I'd sure give it a try. Once that was done, then McAfee should be able to detect and remove the problem.
Hope this helps.
Moved to security awareness section....
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