getting an ISDone.dll error when trying to install a game. the error message says something about ‘an error occurred while unpacking’ and mentions Unarc.dll.
the game is large (around 40GB). the installation gets partway through then fails with this error. tried running the installer as administrator and got the same result.
what is ISDone.dll actually doing and why does it fail? and what’s the actual fix sequence? i’ve seen suggestions ranging from reinstalling visual C++ redistributables to checking RAM, but i don’t know which of those is actually the cause versus people just throwing suggestions.