Preserve Last Login

# Saves the last login so the last user account on the login screen (if enabled) is preserved after you remote login
# to a computer using a different account. Run script before remote logging into a computer and make sure it's
# started before you log in. It will wait for you to login before it completes.
# It will save the current value of last logged in user so after you log in, it will change it back to what it was.

# Save current last login info BEFORE logging in as a different account.  Make sure max script login time is high
# enough so you have time to complete the login.

$SID = (Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI").LastLoggedOnUserSID
$displayName = (Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI").LastLoggedOnDisplayName
$user = (Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI").LastLoggedOnUser
$SAMuser = (Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI").LastLoggedOnSAMUser

# Wait for admin to get logged in.  Soon as the last logged in keys change, reset them back to what they were.
while ($user -eq ((Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI").LastLoggedOnUser)) {
    start-sleep 5
}

reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI /v LastLoggedOnUserSID /d $SID /f > $null
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI /v LastLoggedOnDisplayName /d $displayName /f > $null
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI /v LastLoggedOnUser /d $user /f > $null
reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Authentication\LogonUI /v LastLoggedOnSAMUser /d $SAMuser /f > $null

echo "Last login reset to $user - $displayName"