Starting with Windows 10 May 2019 Update (version 1903), the SYSmark performance score can be over 10% higher when Windows Defender is turned off. To address this, BAPCo is making two changes to SYSmark in upcoming patches. First, we will document the status of Windows Defender in the results PDF file. Second, we will change the default behavior of the SYSmark System Configuration Tool to not disable Windows Defender. You can still optionally disable it if you want.