Maybe you should download the latest runtime kit from their site. ArchiCAD 15's Codemeter driver definitely does not support Windows 8. Possibly this latest driver supports it.
I would first uninstall the Codemeter driver ArchiCAD installed, would restart the computer and then install the donwloaded version.
I don't know if anyone used codemeter drivers that were different or newer version than the one that came on the ArchiCAD installation DVD. But if I remember correctly it should work.
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