One of the first things I did when I installed Vista was to shut off the UAC and driver signing.
After reading this post, I thought I would try UAC again to see how often it pops up.
Not very often actually.
I think that it would be prudent to leave it on unless you are using programs repeatedly that cause a popup. If I was going to run some benches I would turn it off for the duration of my testing and then turn it back on when just doing regular work.
Just my 2 cents. Whatever works for you is what you should do.
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