i.e. everything that happens until you can open the octane viewport for the 1st time.
this post will be extended to cover known problems...
- It might be needed to turn off AV protection until the installation is done.
the installer uses a virtual machine in order to be a self contained .exe for a more simple program, that unpacks all the stuff from a virtual file system. this strategy makes it also possible to do database updates or even scene file updates in the future, if an update would require such things. might look suspicious to some av engines if a downloaded file tries to start a virtual machine.
and please, if needed, turn your AV protection off (or allow it for that specific file) just and only for the installation process - it is definitely not needed to dump AV protection in order to run the plugin itself!