Dear customer, Please download the file from www.mcpos.com/download 1) Save the file to your disk 2) Bring the file to your restaurant. 3) Run the file on computer c1 (main computer), or the old files will be overwrite. 4) Close MCPOS on all computers 5) On main computer, double click on the "update" Icon on desktop. Other computers except main computer, click "updateclient" icon on computer desktop. 6) Run MCPOS on the main computer, after it show up main screen then run MCPOS on other computers. 7) Update finish Thanks Support Team A.D.S Inc