![]() Then re-join without un-joining the computer to the domain. In AD right-click the computer and select Reset Account.Instead of doing that we can just reset the secure channel. You’ll have to recreate all of that stuff from the excellent documentation that you’ve been keeping. Further if you had that computer in any groups or assigned specific permissions to it those are gone because now your computer has a new SID, so the AD doesn’t see it as the same machine anymore. Doing so is kind of a pain because it requires a couple of reboots and the user profile isn’t always reconnected. The classic way to fix this problem is to unjoin and rejoin the domain. These all stem from the same problem and that is that the secure channel between the computer and domain is hosed. The symptoms can be that the computer can’t login when connected to the network, message that the computer account has expired, the domain certificate is invalid, etc. Occasionally a computer will come “disjoined” from the domain. It’s not that we don’t know AD, it’s that we forget or miss new features. I suggest that everyone join a usergroup and/or a study group. This trick comes to be via my Active Directory study group. If you wish to create a new account and add it to the local Administrators group, the command sequence is: If you wish to enable the disabled-by-default built-in Administrator account instead of resetting the password on an existing account, the command is: ![]() You can now log on with the new password.If you don't know your user name, just type net user to list the available user names. You should see a command prompt where you can enter the following command to reset the Windows password:.After you see the logon screen, press the SHIFT key five times.Type this command to replace sethc.exe with cmd.exe: copy /y C:\Windows\System32\cmd.exe C:\Windows\System32\sethc.exe Reboot your computer and run the Windows instance for which you don't have the administrator password. ![]()
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