Even with the exclusions, we're now having issues with the installer processes hanging after they finish which then eventually times out in SOLUS3 - it is eventually logging it as successful as the setup does run, but means ~30 minute timeout delay between each part of the deployment. This also happens when installing manually from extracted packages (you can see the processes continue to run in task manager). This appears to being caused by the Sophos "Malicious Behaviour Detection" module which Sophos has started turning on. We've got a case open with Sophos at the moment to troubleshoot further.