Installshield Setup Launched But Seems To Have Closed Without Finishing

Open Command Prompt as Administrator (search cmd > right-click > Run as administrator). Type the following commands one by one, pressing Enter after each:

msiexec /unregister
msiexec /regserver

You won’t see a success message—this is normal. Open Command Prompt as Administrator (search cmd >

If the setup closes instantly, you can bypass the broken launcher entirely by extracting the files manually. You won’t see a success message—this is normal

This bypasses the InstallShield bootstrapper entirely and uses the native Windows Installer service, which is far more stable. the engine crashes on launch.

InstallShield stores extracted setup files in a hidden cache. If this cache is corrupt, the engine crashes on launch.

Restart your PC after clearing the cache. Now try running the setup again.