Delete files in C:\Windows\Temp to prevent old, corrupted installer scripts from interfering.
If the software and its accompanying IsScript file were designed for an older architecture, Windows compatibility mode can bridge the gap. Right-click on the installer file and select . Navigate to the Compatibility tab. isscriptmsi new download
If you are a developer or have InstallShield installed, running a product update within the application will install the latest isscript.msi . Steps to Fix "ISScript.msi Missing" Errors Delete files in C:\Windows\Temp to prevent old, corrupted