This morning i have installed the KB4493453 update for Server 2008 R2 SP1 but where the KSC is installed i have a very high cpu consumption (100% with the server blocked).
I believe the problem is in KSC because it is the only server that is giving me problems with this update installed.
I had to uninstall the KB.
On this server i'm using KSC188.8.131.521 with KS Server 10.1.1.746.
This KB is not a security update but these changes will be included in future updates.
I wanted to publish this post here on the community because someone might have the same problem.
Next week i will open a ticket with technical support.