at first view it seems to be related to the fact that the laptop has two active LAN connections at the same time.
I suggest you to check the DNS and see at which IP address the DNS server points to; then disable the network interface card that has the different IP address and try again.
For the AD the COMPUTERNAME$ account (hidden) must point to a unique IP address and not to more than one.
Let me know if this solution helps yuo otherwise please check the event logs and post here the errors related to this behaviour.
Thank you very Much, this sorted the problem.
Many Many Thanks