How to update MS SQL 2008 R2 SP1 to SP2

MS SQL 2008 R2 SP1 TO SP2 UPDATE

STEPS: 

*Download below Sql 2008 R2 sp2 update file

SP2 download link; https://www.microsoft.com/en-us/download/details.aspx?id=12548


* Move sql roles to other server from failover manager.

* Installation

Double click the downloaded update file 

Click Run 

Click next

Click next

Accept license and click next

Click Select all and click next

update completed.

Done...