ESET Server Security 8.0.12003.0 does not work anymore on Windows Server 2008R2

[microteq 0]

After having installed version 8.0.12003.0 on a Windows Server 2008R2, when you first login after the restart of the server, everything seems to work fine. But after logging out and logging in again, the tray icon is not visible anymore and the ESET Server Security Client cannot be started anymore (nothing happens when you doubleklick the software icon)

[Marcos 5,469]

Please provide logs collected with ESET Log Collector for a start.