Virus Worm/Win32.Nimda.gic[NET] in file avgcorex.dll

i used virustotal.com to scan file avgcorex.dll and it found a virus Worm/Win32.Nimda.gic[NET]!
what should i do?!
AVG IS can't solve it! (T-T)
os window 8.1 pro
AVG IS 2015

"9/10/2015, 2:55:46 PM";"NT AUTHORITY\SYSTEM";"Update";"Update completed."

i always update!
i uninstalled AVGIS and set up again!
but when i checked file avgcorex.dll on website virustotal.com then it still found Worm/Win32.Nimda.gic[NET]
and i searched name of this virus in avg site!
"no found it?!"
how can i do?!
and how can i send this file avgcorex.dll for you checking it?!
(-_-)// help!
it's really dangerous virus?!

Hello Long. I do understand your concern. May I know you have updated the AVG product till date ?

Thank you.

Hello Long.
I am really sorry to know this. You can submit the sample for thorough analysis here in the following link: http://www.avg.com/submit-sample . Thank you.