Windows XP Logo TestingWhen using the Microsoft XP Operating System, the OS has a database of devices that Microsoft has tested and "approved" for use with XP. As Microsoft tests devices they update the list with more devices. If a device has not been tested or has not passed testing the warning message will display.Using a device, which has not passed testing, may cause problems with the system or be incompatible with other devices. However, Nikon has tested our devices and all devices supported on Windows XP are fully compatible. The warning message can be ignored. Print Share By Email Share By Social Ask A Question FaceBook Twitter