TechnicalSuite X6 Installation problem on Windows 8.1

Not able to install CorelDraw Technical Suite X6 on a 64-bit machine running Windows 8.1. The installer is stucked on the message: "Initializing setup. Please wait..." the only thing I can do is aborting the installation. Then tried to follow the Corel Support suggestion of closing all other applications, disable antivirus, work off-line, launching installation with admin credentials but... but nothing changes.

Please help.