Due to an incompatibility with the graphics drivers and the total lack of updates since 2011 (!!!!) ColorChecker Passport no longer works with Windows 8.1 and Lightroom CC! Response support: we must change some sensitive internal Windows settings (these are strongly discouraged by Microsoft) to circumvent the problem, even if it crashes your PC with other programs or simply in Windows! Policy scandalous neglect of the customer, purchase to avoid, I uninstalled the program and end up with a costly and unnecessary charter, good to throw away.