Hi All, I have lodged a track number; 7613034031 due to sashost.dll locked down issue. The scenario I having was for the new machine (reimanged/rebuilt). Installation of SAS 9.4 M4 through SCCM was deployed without issue. Afterward, uninstallation was done successfully with sccm as well. However, I did notice there are left behind like sashost.dll is not removed. So I rebooted the machine then I remove the sashost.dll From there on Installation always failed through sccm afterward. Based on the workaround found above by Daniel, I included tasks in my PS script installation & Uninstallation. Pre Installation/Uninstallation 1. Stop Services "Windows Event Log" ; Stop-Service -Force -NoWait -Name "EventLog" 2. Change the startup type of the EventLog to Manual first; Set-Service -Name "EventLog" -StartupType Manual 3. Remove sas registry sas key have; Remove-Item -Path HKLM:\System\CurrentControlSet\Services\EventLog\Application\SAS -Recurse -Force -ErrorAction SilentlyContinue Post-Installation/Uninstallation 1. Change the startup type of the eventlog back to Automatic; Set-Service -Name "EventLog" -StartupType Automatic Above task resolve my installation/uninstallation issue through SCCM The target OS in my environment is windows 10 x64. ... View more