intsallation problem in arduino IDE


i tried to install arduino IDE in my lap ( windows 7 os) when i try to install the arduino IDE it is not installing it is executing itself and takes long time to open the ide window and also it take more time to take new sketch window ,

i tried different packages no use i got the same delay also before opening the sketch window i am geeting am pop up message that " an error occurred while starting the application"

how can i resolve this issue