The InstallShield script engine, or IsScript.msi, is required for InstallShield installer files. If the InstallShield script engine on your computer is corrupted, you will receive an error message such as "Cannot find IsScript.msi" or "The version of IsScript.msi is old." Install the IsScript.msi script engine by verifying which version you need and downloading its installer from the official InstallShield site.
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Right-click the file you are installing, then click "Properties." If you are installing a program from a CD, open Windows Explorer by clicking "Start," "All Programs," then "Windows Explorer." Click the CD drive in the left pane of the Windows Explorer window, then right-click the "setup.exe" or "installer.exe" file on the CD and click "Properties."
Click the "Version" tab at the top of the "Properties" window.
Read the "File Version" number at the top of the Properties window under the "Version" tab.
Open the InstallShield IsScript.msi downloads website (see Resources).
Download the IsScript script engine installer version corresponding to the "File Version" number. Click "Open" in your web browser when prompted.
Start the IsScript.msi installer by double-clicking the "IsScript.msi" file in the downloaded Zip folder.
Click "Next" in the welcome window.
Read the license agreement in the "License Agreement" window. If you agree, click "I Accept," then "Next."
Install the IsScript.msi Script Engine by clicking "Install" in the "Ready to Install the Program" window.
Finish the installation by clicking "Finish" when prompted.
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