False positives for programs running 'net user'

I’m a developer and work at a organization where sometimes I need to give users temporary admin access in their workstations.

For this purpose I developed a windows service that reads a configuration file (with parameters for user permissions) then runs the ‘net user’ command to allow or disable admin access.

The program is compiled and published as a Windows Installer file just fine. But when I install the program on the user’s computer all Avast Pro/Free/Endpoint detect the executable as a virus.

This behavior forced me to create an exception in the File Shield.

My question: why is my program detected as a virus to begin with?

what does avast say?
have you tested the file at www.virustotal.com
can you attach a screenshot of the avast warning?..and link to virustotal scan when tested

if you think this is wrong, report it here http://www.avast.com/en-no/contact-form.php