A quick Google brings up a lot of links showing that this file is
connected with this program:
C:\Program Files\Fidelity Investments\Fidelity Active Trader\atng.exe
If this is a legitimate program you installed, contact the program's
tech support for help.
Otherwise, here are general malware removal steps:
http://www.elephantboycomputers.com/page2.html#Removing_Malware
If the procedures look too complex - and there is no shame in admitting
this isn't your cup of tea - take the machine to a professional
computer repair shop (not your local version of BigStoreUSA).
Malke
--
Elephant Boy Computers
www.elephantboycomputers.com
"Don't Panic!"
MS-MVP Windows - Shell/User