I have downloaded the latest android studio bundle from android site. Installation was successful, but when I run it for the first time, it shows a window in the screenshot
its not stuck. its actually downloading some tools. if we download like this or through SDK manager.exe the speed is limited. so it will take much time. so i tried to open it without internet connection and it showed me some missing tools. (andoid sdk tool 21.1.1 ) i had 21.1.2 installed but it still showed this. so i manually downloaded it from internet ( here you will get your max download speed). and placed it with 21.1.2 installation file. and now it all works.
ps:it was the only file i missed. it won't be the same with everyone