Effects on SQL Server 2008 R2 Std.Ed. by upgrading existing windows from Windows Server 2008 R2 Std.Ed 64bit to 2012 R2 Std.Ed 64 bit

Hi Everyone,

I have SQL SERVER 2008 R2 SP1 Standard edition Running on windows server 2008 R2 Std.Ed. 64bit.

Now I have to upgrade OS from Windows Server 2008 R2 Std.Ed 64bit to Windos 2012 R2 Std.Ed 64 bit.

So, Now what will be the Consequences if there are any while upgrading which might affect my SQL SERVER

Also it would be very helpful if I can get some steps how this can be achieved.

Regards,
Kalyan Varma K