"Bad" Files

I've been trying to use a mod for a video game (Call of Duty) but Norton is making the process very difficult.

I'm almost certain that the mod is safe, but Norton keeps removing the file.

Threat name: WS.Reputation.1

I told Norton to restore the file, and it did.

Then when I tried to use the File, Norton only told me it was "Bad".

It gave me NO details, it only says: "There are many indications that this file is untrustworthy"

Give me a break.

Could someone:

a) Explain what a "Bad" file is (just a bad reputation or malicious code?)
b) Tell me if I can, and how to prevent Norton from doing this.
 

*Side Note*
There is an ever so slight possibility that the file is malicious, but I VERY HIGHLY DOUBT IT.
Please and Thanks for help.