mllmj.dll infected and can't remove it!!

this has been racking my brain for a few months and i can't get this infected file to go away no matter what i try. The file C:\WINDOWS\system32\mllmj.dll is infected and my antivirus software (Bit defender plus v.10) detects in but will not disinfect it or delete it. i have tried to unregister the file through the command prompt and then delete it in both safe mode and regular mode and it says one of two things: 1.) some message about the process being used elsewhere in the computer or, 2.) the dllunregisterserver entry point was not found. i have read a few different forums about how to correct this problem but they have only come close to helping me and then i was right back in the same little boat with no paddle. here is my hijackthis log file.


Thank you and please help me or my computer is getting the baseball bat.

 

sorry about the inline log here is the attachment of it.