autologon.ps1

@'
 $desk = -join "$($env:computername)"[-2..-1]
 $key = 'HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon'
 & (Get-Command "$($env:systemroot)\system32\reg.exe") @('delete',"$($key)",'/v','AutoLogonCount','/f')
 & (Get-Command "$($env:systemroot)\system32\reg.exe") @('delete',"$($key)",'/v','AutoLogonChecked','/f')
 & (Get-Command "$($env:systemroot)\system32\reg.exe") @('add',"$($key)",'/v','DefaultUserName','/t','REG_SZ','/d',"MyUserPrefix$($desk)",'/f')
 & (Get-Command "$($env:systemroot)\system32\reg.exe") @('add',"$($key)",'/v','DefaultPassword','/t','REG_SZ','/d','""','/f')
 & (Get-Command "$($env:systemroot)\system32\reg.exe") @('add',"$($key)",'/v','DefaultDomainName','/t','REG_SZ','/d','MyDomainName','/f')
 & (Get-Command "$($env:systemroot)\system32\reg.exe") @('add',"$($key)",'/v','AutoAdminLogon','/t','REG_SZ','/d','1','/f')
 & (Get-Command "$($env:systemroot)\system32\reg.exe") @('add',"$($key)",'/v','ForceAutoLogon','/t','REG_DWORD','/d','0x1','/f')
'@ | Out-File 'C:\Windows\autologon.ps1' -Encoding 'Ascii'
try {
 $errHT = @{ ErrorAction = 'Stop' }
 $aHT = @{
  Execute = 'C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe'
  Argument = '-Exec Bypass -File "C:\Windows\autologon.ps1"'
 }
 $HT = @{
     TaskName = 'Set-AutoLogon'
     User = 'S-1-5-18' #'nt authority\system'
     Force = [switch]::Present
     Action = (New-ScheduledTaskAction @aHT @errHT)
 }
 Register-ScheduledTask @HT @errHT
 Write-Verbose -Message "Successfully registered autlogon scheduled task" -Verbose
} catch {
 Write-Warning -Message "Failed to register autologon scheduled task because $($_.Exception.Message)"
}