You get the error "Cannot copy file to target computer" while attempting a Direct Install.
This error occurs if the Console (using the rights of the user running the Console) cannot access the C$ administrative share on the target machine.
1. Launch the Console as a domain administrator.
2. Enable the C$ administrative share for the C drive. In order to do so, it may be necessary to turn off Simple file sharing. This can be done by launching Windows Explorer on the target machine, going to the Tools menu, and choosing Folder Options... Select the View tab and in the Advanced settings portion, scroll down and uncheck "Use simple file sharing"