i am in a pretty messy situation. The issue is as follows. all of a sudden one of the employees computer got out of the network, i.e it says while entering the username and password, : trust relationship between the workstation and primary domain failed. Now i tried many ways and then i reset the computer in the AD. it works fine but once he logs off again he is out. i need to reset his account from the AD. now people suggested switching off the wifi and entering as normal user i.e administrator and changing the pc to workgroup and then rejoining to the domain, but for this another issue popped up. i cannot access the computer account of administrator. it says it is disabled. i tried to enable but now the message in the computer management are a when trying to enable it is that the password complexity does not match

it is all round attack.. hehe.. please give me a solution