Ensure %ComputerName; is online and not blocked by a firewall. 2. Ensure that file and printer sharing is enabled on %ComputerName; ...

1. Ensure %ComputerName; is online and not blocked by a firewall. 
2. Ensure that file and printer sharing is enabled on %ComputerName; and it not blocked by a firewall. 
3. Ensure that there is sufficient free space on the system volume. 
4. Verify that the ADMIN$ share on %ComputerName; exists. If the ADMIN$ share does not exist, reboot %ComputerName; and then try the operation again.