A user has a new computer and all has been working well until lately this past week the computer will not find the domain controller. When the user attempts to login to the domain she receives the following error. "windows could not connect to the domain controller either because the Domain Controller is not available or because your computer account could not be found" I have removed the computer from the domain added it to a workgroup and then rejoined it to the domain and the user is able to connect to the domain again. This resolves the problem for a day or two but the issue comes right back again. I have replaced the lan cable and have attempted to connect the user to the domain in the docking station and out of the docking station. Does anyone have any suggestions or resolutions to this issue?