The network drive you are attempting to install to is reporting that it is not ready

[syfreeman]

trying to move ProSeries to a new computer. Getting this error message

[IRonMaN]

A couple thoughts.  

Try rebooting your computer.

Try opening task manager and close any programs running in the background - especially if it is an Intuit product.

[Just-Lisa-Now-]

You wouldnt "move" PS to a new computer, youd "install" it on a new computer.

Are you logged into your My Proseries account and downloading/installing the program on the new system?