MS SQL Server 2016 takes 10% constant CPU usage, the usage is even if I take all the databases offline. This was never the behavior of MS SQL Server in past.CPU fan starts running in high speed. If there is no operation in background why take so much CPU. 10% of a Core I7 is too much at idle.
Machine Spec. Windows 8.1, 6GB RAM, Core i7 2nd Gen 2.2Ghz
Diagnosed the problem see solution.