Dear Troubled User

Sounds like Vista is working perfectly to me.  
Had you thought about adjusting the UAC settings ?  
Go to*:     Start > Help & Support > UAC Settings*

Perhaps your expectations were that it would be Windows XP, 
Vista is so much more than that. 

Yours,
A Happy Vista User

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html