If errors are found, it indicates faulty hardware that may need to be reseated or replaced. Verifying the Solution Once you have completed the troubleshooting steps:
If you are experiencing errors or crashes during installation, here are some common issues and solutions related to ISDone.dll:
If you also face Unarc.dll errors, type this command and press Enter: regsvr32 unarc.dll
It wasn't just any file. In the coder underground, IsDone.dll was known as the "Skeleton Key." It allowed legacy 32-bit installers to unpack massive archives on modern 64-bit architecture. Without it, the installer would choke on its own data, thinking the system didn't have enough memory, even when it had terabytes to spare.