Here's how you can accomplish this under Vista:

Many programs provide the right click and choose Run as Administrator option.
This may sound confusing, but even if you are an administrator, the above option grants you FULL administrator rights. This is just one of those UAC (User Account Control) features.

So, when you want to run an installation that you think will touch the registry, run it with the above command.

Alternatively, you can run any command line in this Admin mode from the Start menu using CTRL+SHIFT+ENTER.
If you have a program (such as Visual Studio) that always needs to run in Admin mode, then do the following:

1. 1. Create a shortcut.
2. 2. Right click it and choose properties
3. 3. Select the Compatability tab
4. 4. Check the "Run the program as an administrator" option

Note: You will continue to get the Cancel / Allow message when running in elevated Admin mode.

You may also disable the UAC altogether.
It's not recommended because you system becomes "less secure" or something.

To disable UAC:

1. 1. Control Panel (Normal view, not Classic View)
2. 2. User Accounts
3. 3. User Accounts (yes, twice)
4. 4. Select the "Turn User Account Control on or off" option

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