A maintenance procedure in our DRM system is currently causing problems when activating the game using the executable that comes with the main installer. To proceed with the activation while this maintenance is still underway, please download the file www.reizastudios.com/downloads/GSC2013_GS_FIX.rar , and extract GSC.exe into your GSC2013 root folder, overwriting the original. With this you should be able activate normally. This issue should be resolved now and the fix should no longer be required. You might want to apply it in any case as this also addresses Fingerprint mismatch issues and compatibility with 3rd party d3d9.dll plugins.