Sometime you might see an error message,
There was a problem starting <file>
<file> is not a valid Win32 application.
Where <file> is the path and file name. For example,
C:\windows\Installer\MSI8421.tmp. In most cases, this happens with the Silent Agent with a MSI installer:
You might see this message because Windows firewall is blocking a file.
Disable Windows firewall before installing the agent.