AVG being a complicated product often gets the users stuck with some of the other error to fix this system tray icon missing issue it is advisable that the user conducts a proper stepwise repair of the antivirus program. For conducting a repair go to start then go to control panel, click programs then click programs and features further select AVG from the list of programs that opens, then click change further select repair follow the instructions that appear on the screen and get the system restarted. For any further guidance or assistance connect at the AVG Help Number UK.