SP1 for SLQServer2016 installation failed: error code 0x851A0018

Hi all,

as per post title, I am not able to install the SP1 for SQLServer2016 through the file 'SQLServer2016SP1-KB3182545-x64-ITA'.
Here is what I get:

Error while installing Functional instance of the services of the SQL Server Database Engine
Unable to stop the instance with process ID 2716. Error Detected: Microsoft.SqlServer.Configuration.Sco.ScoException: The service can not accept control messages at this time. --- System.ComponentModel.Win32Exception>: The service can not accept control messages at this time. in Microsoft.SqlServer.Configuration.Sco.Service.ControlService (UInt32 dwControlCode) in Microsoft.SqlServer.Configuration.Sco.Service.StopService (Boolean bStopDependents) in Microsoft.SqlServer.Configuration.Sco.Service.StopServiceWait (Int32 dwTimeout, Boolean bStopDependents ) --- End of inner exception stack trace --- at Microsoft.SqlServer.Configuration.Sco.Service.StopServiceWait (Int32 dwTimeout, Boolean bStopDependents) in Microsoft.SqlServer.Configuration.Sco.Service.StopServiceWait (Int32 dwTimeout , Boolean bStopDependents) in Microsoft.SqlServer.Configuration.SqlEngine.SqlServerServiceSCM.StopSqlServer (Boolean withFailpoint)

Error Code: 0x851A0018.

Well, I stopped the process ID 2716, which is exactly 'sqlservr.exe'.
By trying to install it again, the error changes to the service NT'SQLSERVER'.
I tried to identify it, but I am not sure I managed this one in the proper way: indeed, the retry-installation stopped because of it.

Is there anyone who faced the same issue or an expert who could help me, please?
Thank you very much!