Backdoor.trojan mdm.exe help?

Hi folks,

 

I've searched all over and can find no answer to this. Symantec keeps locating (and "deleting") backdoor.trojan masquerading as mdm.exe, then doing the same thing again ten minutes later. I have followed the instructions on removing it, but the scan picked up nothing, only to later find and delete "mdm.exe" again.

 

There is no record I can find of this online, and the only resources I've found on mdm.exe tell me it's not a virus and not to worry, which is terribly unhelpful. The thing must be hinding in my registry or something, but I don't know what else to do about it from my end. 

 

Please help!