diable user a/c control in vista

you can disable UAC by using one of the following methods:

Method #1 - Using MSCONFIG

1. Launch MSCONFIG by from the Run menu.
2. Click on the Tools tab. Scroll down till you find "Disable UAC" . Click on that line.
   
3. Press the Launch button.
4. A CMD window will open. When the command is done, you can close the window.
5. Close MSCONFIG. You need to reboot the computer for changes to apply.

You can re-enable UAC by selecting the "Enable UAC" line and then clicking on the Launch button.

Method #2 - Using Regedit

1. Open Registry Editor.
2. In Registry Editor, navigate to the following registry key:

   HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System

3. Locate the following value (DWORD): EnableLUA and give it a value of 0.
   

Note: As always, before making changes to your registry you should always make sure you have a valid backup. In cases where you're supposed to delete or modify keys or values from the registry it is possible to first export that key or value(s) to a .REG file before performing the changes.

4. Close Registry Editor. You need to reboot the computer for changes to apply.

In order to re-enable UAC just change the above value to 1.