When I click for creating android new project this window open .I have been restart even though I can't do this. error image is as.

and when click for check update from help menu then this error occure and pop up is that no update found what is problem ?

Your answer is in these three steps
1. goto window->Android SDK manager

2. Select Tools as in picture

3. then hit Install 2 packages at right bottom corner and let it be updated.
