hi 
well the problem as stated in the title  i , i intalled bitdefender 2013 internet security and then noticed that it cause right click to take long time (on my computer icon) to response along with system lag and freezing 
so i tried to repair or unistall and install again   but the problem still the same
i use 4 giga ddr2  of ram and amd 955 cpu
any ideas !!