Android studio istall

Q1: The following SDK components were not installed: build-tools-21.1.1 

STEPS:

1. sdk will be located under C:\Users\<<your username>>\AppData\Local\Android\sdk.

2. You may find that 21.1.2 is already in place 
C:\Users\<<your username>>\AppData\Local\Android\sdk\build-tools
Create a folder with name "21.1.1" under this.

3. Copy all the files from the downloaded build-tools:21.1.1 under android-5.0 to  C:\Users\<<your username>>\AppData\Local\Android\sdk\build-tools\21.1.1

4. Start the Android studio now.

http://dl-ssl.google.com/android/repository/build-tools_r21.1.1-windows.zip