http://windows.microsoft.com/en-us/windows/turn-user-account-control-on-off#1TC=windows-7
To turn UAC on or off
Open User Account Control Settings by clicking the Start button Picture of the Start button, and then clicking Control Panel. In the search box, type uac, and then click Change User Account Control settings.
Do one of the following:
To turn off UAC, move the slider to the Never notify position, and then click OK. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation. You will need to restart your computer for UAC to be turned off.
To turn on UAC, move the slider to choose when you want to be notified, and then click OK. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Try running the following VBscript
on both machines. I use this as part of my BGINFO background to help me remember the setting of any given machine.
dim base, regELUA, regCPBA, regCPBU, regPOSD
base = "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\"
Set objShell = CreateObject("WScript.Shell")
regELUA = objShell.RegRead(base & "EnableLUA")
regCPBA = objShell.RegRead(base & "ConsentPromptBehaviorAdmin")
regCPBU = objShell.RegRead(base & "ConsentPromptBehaviorUser")
regPOSD = objShell.RegRead(base & "PromptOnSecureDesktop")
' wscript.echo "EnableLUA: " & vbtab & regELUA
' wscript.echo "ConsentPromptBehaviorAdmin:" & vbtab & regCPBA
' wscript.echo "ConsentPromptBehaviorUser: " & vbtab & regCPBU
' wscript.echo "PromptOnSecureDesktop: " & vbtab & regPOSD
if (regELUA = 1 and regCPBU >= 1 and regCPBU <= 3 and regCPBA = 2) then
strUSER = "Always Notify"
strADMIN = "Always Notify"
elseif (regELUA = 1 and regCPBU >= 1 and regCPBU <= 3 and regCPBA = 5) then
strUSER = "Always Notify"
strADMIN = "Only Notify on Program Change"
elseif (regELUA = 0 and regCPBU >= 1 and regCPBU <= 3 and regCPBA = 0) then
strUSER = "Always Notify"
strADMIN = "Disabled"
elseif (regELUA = 0 and regCPBU = 0 and regCPBA = 0) then
strUSER = "Disabled"
strADMIN = "Disabled"
else
strUSER = "Unknown"
strADMIN = "Unknown"
end if
if refPOSB = 1 then
strDIMDESK = " & Dim Desktop"
elseif refPOSB = 0 then
strDIMDESK = " & Do Not Dim Desktop"
end if
if strADMIN = "Disabled" or strADMIN = "Unknown" then
strValA = "Admins:" & vbtab & strADMIN
else
strValA = "Admins:" & vbtab & strADMIN & strDIMDESK
end if
if strUSER = "Disabled" or strUSER = "Unknown" then
strValU = "Users:" & vbtab & strUSER
else
strValU = "Users:" & vbtab & strUSER & strDIMDESK
end if
strName = "User Account Control (UAC):"
strValue = strValU & vbcrlf & vbtab & strValA
bginfo = strName & vbcrlf & vbtab & strValue
wscript.echo bginfo