Source:
Enable Disable Built In Administrator Acount
https://technet.microsoft.com/en-us/library/dd744293(v=ws.10).aspx

net user administrator /active:yes

Control Panel -> Users
Create password for Administrator.

EverythingServiceStart.bat
runas /user:administrator /savecred "cmd /c net start Everything & timeout 3" 
start /b %cd%\everything\everything.exe

EverythingServiceStop.bat
::runas.exe /user:administrator /savecred "cmd /c net stop Everything & timeout 3"
::runas.exe /user:administrator /savecred "cmd /c taskkill /f /im everything.exe & timeout 3"
runas.exe /user:administrator /savecred "cmd /c net stop Everything & timeout 3 & taskkill /f /im everything.exe & timeout 3"

RTFM:

net
start
timeout
taskkill

Source:

When using cmd.exe, you can put multiple commands on the same line by using ‘&’ or ‘&&’ between commands. Using a single ampersand (&) will cause the first command and then the second command to be run in sequence. Using double ampersands (&&) introduces error checking. The second command will run only if the first command is successful.


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