I’m not sure where I should report false positives, but the forum is my best guess. I’m using a registered copy of Avast 4 Home, and I have a transformation pack installed on my computer called FlyakiteOSX. I HAVE NOT UPGRADED THE TRANSFORMATION PACK. Though, recently, Avast has detected a trojan in wfpdisable.exe. It makes sense that Avast did this, because this file disables the Windows File Protection system, so that it can effectively modify the system. Please update the next Avast Virus Database! ???
You could also check the offending/suspect file at: VirusTotal - Multi engine on-line virus scanner Or Jotti - Multi engine on-line virus scanner if any other scanners here detect them it is less likely to be a false positive. You can’t do this with the file in the chest, you will need to move it out.
If it is indeed a false positive, add it to the exclusions lists (Standard Shield, Customize, Advanced and Program Settings, Exclusions) and periodically check it (scan it in the chest), there should still be a copy in the chest even though you restored it to the original location. When it is no longer detected then you can also remove it from the Standard Shield and Program Settings, exclusions.
Also see (Mini Sticky) False Positives, how to report it to avast! and what to do to exclude them until the problem is corrected.