Install Windows agents using `msiexec` from the command line

Install the MSI manually from the the command line if you need to customize puppet.conf, CSR attributes, or certain agent properties.

On the command line of the node that you want to install the agent on, run the install command:
```
msiexec /qn /norestart /i <PACKAGE_NAME>.msi
```
You can specify /l*v install.txt to log the progress of the installation to a file.

Install Windows agents using msiexec from the command line