Monitoring of the use of the PC by detection of differences between the screen printings with selected interval. Checking of the use of the PC by automatic capture of screen and checking of the differences between the captures, every xx seconds and safeguard images so different from the preceding ones (~45 KB by image) in a hidden file. The program launches out in the systray of windows© (with with dimensions of the hour) and requires a password to post the principal page or to stop the captures (when one is in systray mode)… The Password per default is “SPATUL”.