You typically only encounter this file when a software installation fails with errors such as: "The InstallScript engine is missing from this machine".
Restart your computer if prompted before attempting to run your original application installer again. Microsoft Learn Troubleshooting Common Issues ISScript.msi - PC HELP PLZ!! - NAXJA Forums
: Look in your software's installation folder (or CD) for a folder named \prerequisites or \Common . You may find files like isscript.msi or isscript10.msi there.
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