HALion Symphonic Orchestra Content and Installation

Virtual instruments Virtual Effects and Add-ons
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I received a solution for this from Support (very quickly too!):

  1. Go to the VST Sound folder on your main installation drive. Likely filepath is: C:\Program Data\Steinberg\Content\VST Sound. You will need the ‘View hidden files’ option enabled in Windows Explorer. For me there was also a further sub folder called VST Sound - HSO.

That folders contains a whole heap of shortcuts which pointed to the incorrect place since the content files were moved.

  1. Open a separate folder view and go to installation folder for HSO (which you can download from [url]https://helpcenter.steinberg.de/hc/en-us/articles/206760630-HALion-Symphonic-Orchestra-Content-Troubleshooting[\url]) and into the \Additional Content\VST Sound\ folder. Copy and paste all of these

  2. Copy all of the content files from the installation folder (step 2) to the VST Sound folder (step 1).

This did not fix the Invalid character issue but this works around it and HSO now works.