Only the built-in administrator account can perform a remote install. If the account is disabled, use the command below to enable it:
net user administrator /active:yes
On a Windows Active Directory environment, administrators with domain administrator privilege can remotely install OfficeScan clients on Windows 7 platform.
If you encounter problems using this deployment procedure, refer to this Microsoft article: Enable and Disable the Built-in Administrator Account.
To check the Windows account, refer to the Troubleshooting Guide for OfficeScan client installation issues.