I am experiencing a similar issue to post 9664 "Installation failed - sufficient privileges to stop system services" (9/29/2016), which never listed a resolution.
Using All-in-one installer (agent + ees) to perform a fresh install of Eset (not an upgrade) on a clean install of Windows 10 Pro, Creators Update. It successfully installs the Agent, but fails to install Endpoint Security. I have tried using network administrator credentials, domain administrator credentials, and local administrator credentials. I have tried installing over the network and locally. I have tried installing the two packages separately. Always the same result (I used the Eset Uninstaller Tool between attempts, as it always leaves a mess of half-installed software).
Did not experience any problems installing 6.5 on machines running any version of Windows 10 Pro prior to Creators Update. Already installed systems updated successfully from Windows 10 Pro 1607 to 1703 without issue. Only new installs appear to fail.
OS: Windows 15063.rs2_release.170317-1834
ERA: 6.5.522.0
Endpoint Security: 6.5.2094.0
Installer: ERA_Installer_x64_en_US.exe
error on Eset server: "Task failed, try to install software manually."
error on workstation: "Verify that you have sufficient privileges to stop system services."
On workstation services 'ESET Remoter Administrator Agent' and 'ESET Service' log on as Local System account.
Please help me find a resolution. Thank you.