Dropped Vista Ultimate on an old 20 gig drive to check it out for when I have my new pc finished.(hopefully this weekend)

Ran Auslogics reg defrag after I had Vista the way I think I want it.
It compacted the reg by 13% and I definately noticed an overall improvement.
Only prob is that the desktop icons for both reg and disk defrag show as a blank yet they show fine in all programs and quicklaunch.
I think I may have stuffed them up when I got rid of the shortcut arrows.No big deal though.
And yes, I have had a big prob on another machine which required a image restore after running a reg defrag so it's up to you if you want to run it.