Example using the Clearwell Utility to stop the eDiscovery Platform (eDP) services:
Stopping All Clearwell Services...
======== target = stop-services
Buildfile: D:\CW\V82\build.xml
log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: logs\ant_output.log (Access is denied)
...
It seems that on Windows Server 2012, the usual methods of disabling User Access Control (UAC), including C:\Windows\System32\UserAccountControlSettings.exe are not sufficient. The only reliable way to disable UAC is to update the Windows Registry directly.
A reliable indication that UAC has not been fully disabled is that a standard command prompt will NOT include Administrator: in the title (Figure 1).
Figure 1.

In contrast, a command prompt launched when UAC has been fully disabled should include Administrator: in the title (Figure 2).
Figure 2.

As detailed in the eDP Installation Guide, UAC must be disabled. This is required both for the product installation and for everyday usage of eDP.
To reliably disable UAC do the following steps:
1. Launch a PowerShell console as administrator
2. Run the following command to disable UAC:
Set-ItemProperty -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\System" -Name "EnableLUA" -Value "0"
3. Reboot the server.
NOTE: If UAC keeps getting re-enabled, please check for Group Policies that may affect it.