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dfghj.exe is a ROOTKIT, you should remove it as soon as possible. Any good anti virus will easily remove this from your PC, you should full scan your PC and remove it from your harddisk.
Associated malware group – Rootkit
File Behavior -
DFGHJ.EXE has been seen to perform the following behavior:
-Executes a Process
DFGHJ.EXE has been the subject [...]