Look at the File Version field to determine the version number of the IsScript engine you need:
If the file version number is 2.0x or less, download the IKernel engine and install it on your computer.
Delete the folder C:Program FilesCommon FilesInstallShieldengine from the machine.
Download IkernelUpdate.exe
Once downloaded, double-click it. This installs the IKernel engine, which should fix the issue.
If the file version number starts with 7, download the following ISScript.msi file and install it on your computer.
Delete the folder C:Program FilesCommon FilesInstallShieldDriver7 from the machine.
Download IsScript7x.zip
Unzip the above file using the WinZip utility.
Double-click the IsScript.msi file. This installs the IsScript engine, which should fix the issue.