1. Format SD CARD
Start=¡·CMD£¨Win 7£©=¡·format/q g:/fs:fat32/a:4096  =>Enter
"g" is the disk number of your SD card that shows at computer, right click your mouse to format is usually invalid; generally the capacity of he SD card is about 2-16 G

2.After formatting,save¡°DWIN_SET¡±files to SD card,insert SD to the card slot at touch screen,turn on,it would be upgrade.

Note£ºIf there are problems after upgrading,please try it again.