Open PowerShell as administrator. Run this command sequence:
$credential = Get-Credential (enter domain admin account when prompted)
Reset-ComputerMachinePassword -Server ClosestDomainControllerNameHere
Open PowerShell as administrator. Run this command sequence:
$credential = Get-Credential (enter domain admin account when prompted)
Reset-ComputerMachinePassword -Server ClosestDomainControllerNameHere