[gnaritas]

That's because UAC in windows is worthless, it's a broken version of sudo that fails to do the one thing necessary, force a re-authentication of credentials. There's little point in popping up a warning than people can simply click right past without requiring admin credentials.

[Terr_]

It works if you have a separate admin account. Then at least you have to enter its credentials, if not your own.

[gnaritas]

Yes, but then you aren't doing things in your own account with temporarily elevated privadledges which is the intent of UAC, it's supposed to be like sudo.

[ryanlol]

sudo as root usually doesn't ask for password either.

[gnaritas]

sudo as root is unnecessary, sudo only makes sense for non root accounts; and sudo prompts the user for his own password ensuring that even someone that walks up to your computer can't perform root actions just because you're logged in and ensuring the user can't simply click without thinking which is what everyone does on windows which is why UAC is so often disabled.