Install old Cumulative Update SQL Server 2016 Standard
You said you are running a new instance of SQL 2016 SP2 CU13. In order to install CU4, you will need to uninstall later CUs. I just spun up a new EC2 instance with SQL 2016 STD and went to Control Panel &gt; Programs &gt; Programs and Features &gt; Installed Updates and saw Hotfix 5820, 5698, and 5598 after SP2. They should be uninstalled in the order listed from the newest to the oldest. After that you will be on SP2 and you can install SP4.