Windows 7 UAC question

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This might clear up things for you:
http://msdn.microsoft.com/en-us/library/aa511445.aspx

Depends really what access privilidges a standard user has/is given.

When you’re logged on and UAC is configured with its default configuration your user account always runs with non-admin privileges (even if your account has administrator privileges). When you run a program or change settings that require admin privileges UAC steps in and asks you if it’s OK to pass your admin privileges along with a UAC prompt.

If you are logged on using a Computer Administrator account, Windows just asks you to consent to running the program. However, if you logged on using a Standard User account, Windows can still run the administrative program—the UAC prompt asks you to select the username and enter the password of a Computer Administrator account.