Exactly what I expected you to post, nothing valid or to the point. Since you got pwned again finding that UAC is indeed a feature which well....works.
what use does it serve to block every piece of software you try to install on the system
What, you mean you actually let any software install on the computer without informing you
How many people will read what it says every time they try to do basic things? Does it give you a different kind of alert when you try to install a virus? No, it obviously doesn't.
Average Joe's will cos it attracts attention to the UAC prompt when it papers. Those who don't want to read it are themselves responsible for screwing their OS. UAC warns them.....it is there decision whether to listen to it or not.
& how do you know, have you tried installing a Virus in Vista with UAC turned on yourself? Well, I have, so I can say. It informs with all the info about the application & gives the user a chance for prevention.
The biggest annoying thing about it is that it is either there or not. You either keep it turned on and get bugged by the system day in and day out for everything you do on it, or you turn it off and the system will keep mum even if you commit a crucial misstep that could paralyze the system. It is just a feature that Microsoft has put in place to show that they are taking security seriously and doing something about it - and they totally expect every user to turn it off.
You got Vista RTM now I guess, right? Turn off UAC, now go & try to replace some file in C:\Windows\system32\,, try to modify or delete any file. Vista will not let you without admin control.
So, as you can see, UAC is simple, there is no need to turn it off if you are an average Joe. If you are turning it off anyway....which I do not recommend you cos u indeed are an average Joe of Windows, you still can't replace or modify system files manually or by a Virus. Even then if you take permission to screw your computer, Sorry Vista can't help you in that case.
Suppose UAC is turned off
1) I got a Virus in outlook mail in the form of EXE, well...outlook blocks exe already so I can't open it
2) If I get a mail to go to some webpage & click on some link to do something, well....it will start installing an app (virus) in which case IE 7 notifies me that there is an exe being downloaded & installed without informing you. Here is the thing....average Joe is notified about it, now weather he wants to install an application from an un-trusted source is again his decision.
3) Suppose I do install it, now Windows defender is running, & it will not let this new app inject itself in system startup & will notify u that some app is trying to start at system start up.
phew...average Joe notified, now he still has all the rights to screw his computer.
I do agree, there should be a checkbox for "Remember my settings", so that Power users can turn on UAC but still work properly.
P.S. - Since you have not used Vista, you cannot say it sux. Use before saying anything. About me, well I have been using MacOS 9/X/10.2/10.4 long before you even knew the meaning of the word Computer. MacOS X is good, but not that good, just like Vista which is good but again not that good.
Back to topic - UAC is nagging, but if used can save from lots of problem. Those who want to turn it off can do so, yet they will be informed when doing something wrong. UAC could have been implemented in a better way so welll....lets hope & give feedback to MS to improve it in Vista SP1. UAC is not a show stopper for the success of Vista.