This usually occurs if the device receives too many commands in too short a time. To reset the device, press the Power/Video and Photo/Audio buttons at the same time. The device should be reset and power off.
We suggest that you try to use VLC Media Player to play the video files back. You can easily download it for free online in only a few minutes. Sometimes Windows Media Player and Quicktime cannot read the file type that this camera records in. Please go to this website directly: http://www.videolan.org/vlc/.
Click this link to learn How to View Your Recordings with VLC Media Player.If this is occurring, try copying the video files to your PC. This happens when the file is too large to be played back using your USB connection.
Please see below for full instructions in the attached copy of the User Guide for this device.