>It works fine for me I just put FSX, windows on the outer>fast area.. However it seems to take an age sometimes>reporting 151hrs to complete !!??What O/S are you using? I know UD version I tried on Vista 64-BIT left much not defrag and so I reverted to O&O Version 8.6. Have since bought the O&O version 10 upgrade and that performs perfectly on Vista 64-BIT with 100% defrag.Ray

Im using xp, I think I'll hold off on vista until it stops being a beta ;)

>Im using xp, I think I'll hold off on vista until it stops>being a beta ;):-lol Times still when I think I should have waited too but generally, after a few problems in the early days, it performs perfectly. The 64-BIT (HP) with 4Gb RAM, runs FSX without stutters/blurries and that was all I was worried about. Will add that it's taken me and my self-build system many months to get somewhere near correct so it wasn't easy at all.FSX Spec PCE6700 @ 3.2GHz: Asus P5N32-E SLI Plus: (BIOS 805) EVGA 8800 GTS 640MB KO ACS3:4Gb Corsair TwinX PC6400:WD 150Gb Raptors:Toughpower 850W PSU:Vista HP 64-BIT:Ray

I use Perfect disk and find no problems with it. I don't see the point of using these complex de fraggers that need all this tweaking and researching to get things working well.Let's think about this for a second.What extra real performance gain will you get using something like ultimate defrag compared to any other good one?Okay, files are more organized on Ultimate defrag if you are trying to produce ultimate performance. But what does that mean in real terms.The changes are you wouldn't know the difference and if a real blind trail was done I'd put money on it 99% of users had know idea if a computer that had just been de fraged was defraged by one particular defragger? Ultimate or not?Let's put this another way if you like. I don't read any posts that read something like.I just got Ultimate Defrag and wow. Now all my performance issues are gone. FPS has definitely gone up from and average of 24.1 fps to 24.3 and I can prove it. Micro stutters are harder to prove but for sure these have gone now or almost gone...... The point is these posts just are not made so the truth is it's all behind the ears and in the imagination. At least it is in real terms. Save your money and buy something useful for FSX like ASX or take your wife out for a meal.Dan

Ken,Where is this tutorial for optimising UD for FS?Thanks,Don

I tried the 30 day trial ware version of this program and noticed no difference in FSX performance from the default XP defragger. As they say in the movie world - "These are not the droids you are looking for".Gary

Yeah I decided to stick with Perfect Disk, really didn't see much of a difference even after I got it working.