Error when configuring secondary DC

I’m trying to configure a second server as a secondary Domain Controller in our domain but I’m receiving an error in the last step that says –

the operation failed because:

“Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again.

I have disconnected all shared drives and restarted the new server and our DC. Any ideas?