Other reviews say that it works sour W8. In my case this is not the case. Installed in a Dell XPS PC, the card is recognized in the device manager. Drivers are ok. The detection of a Panasonic camcorder and its management is in playback mode is ok (play / pause / rew ...). By cons, no transfer of picture or sound from the camcorder and PC. I had no problem of time XP ....