When you type net use * \\ComputerName\ShareName or net view \\ComputerName, you may receive:
Error 5 Access is denied
Logon Failure: The target account is incorrect
You may, or may not, be successful using the DNS FQDN (Fully Qualified Domain Name).
Check the Active Directory for a duplicate computer account. If you find it, remove the duplicate, and restart the client.