Query to check which backup task is running at back end

SELECT r.session_id,command,

            s.text,

            start_time,

            percent_complete,

            CAST(((DATEDIFF(s,start_time,GetDate()))/3600) as varchar) + ' hour(s), '

                  + CAST((DATEDIFF(s,start_time,GetDate())%3600)/60 as varchar) + 'min, '

                  + CAST((DATEDIFF(s,start_time,GetDate())%60) as varchar) + ' sec' as running_time,

            CAST((estimated_completion_time/3600000) as varchar) + ' hour(s), '

                  + CAST((estimated_completion_time %3600000)/60000 as varchar) + 'min, '

                  + CAST((estimated_completion_time %60000)/1000 as varchar) + ' sec' as est_time_to_go,

            dateadd(second,estimated_completion_time/1000, getdate()) as est_completion_time

FROM sys.dm_exec_requests r

CROSS APPLY sys.dm_exec_sql_text(r.sql_handle) s

WHERE r.command in ('RESTORE DATABASE', 'BACKUP DATABASE', 'RESTORE LOG', 'BACKUP LOG')

Kill the process

Kill

KILL 1866 WITH STATUSONLY >> check the status on this progress