A very specific error!
Here's a feature concept related to the "isdonedll unarcdll error code 6 exclusive" issue:
"Error Code 6 Resolver" for IsDone.dll and Unarc.dll
A dedicated tool or module that specifically targets and resolves the Error Code 6 issue associated with IsDone.dll and Unarc.dll, which are commonly encountered during installation or extraction of games and software.