Microsoft and Nalpeiron have identified an issue with Windows 8 and the Nalpeiron service that is included in Orca3D. The Nalpeiron service is part of the licensing mechanism in Orca3D. The version of the Nalpeiron service that is in the current release of Orca3D will prevent updates to Windows 8 from completing successfully, and prevent you from adding features in Windows 8. Microsoft's knowledgebase article on the issue is here: http://support.microsoft.com/kb/2787752
Nalpeiron has created an update to the service, which can easily be installed to resolve this issue. Visit www.updatemyservice.com to download the update. Another option is to temporarily stop the Nalpeiron service while you are updating Windows 8 or adding features. This process is described in the Microsoft knowledgebase article.
Future Orca3D updates and WIP releases will include the updated service. This issue is only with Windows 8; other versions of Windows are not affected.