Bookmark this guide. If you see a grey setup box with those three dreaded DLL names, you now know exactly how to fight back.
If you are an avid gamer, software tester, or someone who frequently downloads large archives (such as repacks from FITGIRL, DODI, or Razor1911), you have likely encountered the dreaded error popup mid-installation. The screen usually turns grey, the progress bar freezes, and a cryptic error message appears citing isdone.dll , unarc.dll , or ISArcExtract . isdone.dll isarcextract unarc.dll fix download manager
Download the file again using a standard browser with no download accelerator. If that works, permanently reduce your download manager's connection count to 1 for large, compressed archives. Your installation will run slower, but it will run without errors. Bookmark this guide
Download Managers (like IDM, JDownloader, Free Download Manager, or Xtreme Download Manager) download files in segments. If your internet connection is unstable or the download manager has a bug, the downloaded setup file might become or have missing bytes . The screen usually turns grey, the progress bar
These errors are often accompanied by the text: "An error occurred while unpacking: Unable to execute file in the temporary directory. Setup aborted."