Can anyone tell me what "Grime" is?

[system]

Hello Everybody,

I am Carl, and I just downloaded Avast.

It says I have Grime on my PC, but is Grime a virus? What is Grime?

Thank you for your knowledge and assistance whomsoever responds.

__
Sincerely,

Joshua Carl*

[Eddy]

Grime = Dirt
https://www.avast.com/grimefighter