Morning and Happy New Year!
My apologies if I'm not in the right place (first hit I got on Google). I'm running Avast Internet Security (version 2014.9.0.2011) on 2 pcs. Was Grimefighter released as part of the Suite update recently? I haven't seen the Grimefighter option on my pc, yet my husband did get it on his. I have the same concerns as other stated. While I like it shows what the analysis found in general, I too haven't found any way to see in detail what it plans to do.
I would ask GF show the analysis in greater detail, backup the system beforehand and and allow me to control what gets done. System hardening can cause problems if you don't know what you're doing and I'm not comfortable giving software a blank check to do what it wants on such a wide scale without any control on my part.
Thank you for taking the time to read this.