(Optional) If you use third-party security software like Avast, Malwarebytes, or Bitdefender, right-click its icon in your taskbar tray and temporarily pause protection until the installation concludes. 3. Clear Out Your Windows Temporary Folders
: Demanding unpacking scripts push modern multi-core processors to 100% capacity. If a CPU hits its thermal ceiling, it drops instructions to protect itself, resulting in a corrupted extraction code.
Follow these solutions in order from simplest to most advanced. isdone.dll error elamigos
When your physical RAM fills up during extraction, Windows relies on Virtual Memory (a dedicated section of your hard drive used as RAM). If your virtual memory limit is too low, the isdone.dll extraction will fail.
The /LOWMEMORY switch forces Inno Setup to use less aggressive decompression, often bypassing RAM-related isdone.dll faults. (Optional) If you use third-party security software like
Open the , type "Advanced System Settings," and open it. Under the Performance section, click Settings .
If the error "Unarc.dll returned an error code: -1" persists, your RAM might be unstable. Windows Memory Diagnostic tool to check for hardware errors. If a CPU hits its thermal ceiling, it
Large repacks require a significant amount of temporary space to unpack files.
Temporarily disable in Windows Security or your third-party antivirus (like Avast or Malwarebytes) before running the installer.
Common error messages include:
Then: