Gee, it looks like people who've actually tried UltraDefrag don't seem too thrilled with it:
I'm trying UltraDefrag on a well-fragmented hard disk (36% fragmented), and the UltraDefrag GUI leaves me unsure if it is doing anything or not. It has been up for an hour and a half, and the display hasn't changed a pixel since it displayed the original analysis. The progress bar on the bottom still shows 100%, so that is obviously meaningless. The process explorer shows that it is taking up CPU and an increasing amount of memory, but I still can't tell if it is actually doing anything. I think it is time to uninstall it and move on.
Installed on a relatively fast Vista business machine with a 650 gig HD of which 8 gigs were used. Analyze showed 12% fragmentation. I ran the program. Next day (7 1/2 hrs later), it showed being only 30% done. Trash can!
All applications, especially security software, must be closed/shutdown otherwise it is slow and does not do as well.
Can't learn how to use it; UD does not even install on Windows 7. So, it is worthless for me.
Since XP, Windows has offered disk optimization as a background process. I thought that using this was supposed to eliminate the need for periodic defragmentation with a separate tool.
Won't install properly on Win7 64bit (no icons to executables). Puts all it's stuff in the windows system32 folder and the executables won't run manually either. Also caused a one-time boot failure. Maybe installed a virus (I'm hunting)? POS and/or dangerous?
I tried out this tool recently on 2 laptops I was servicing. When using the consolidate space option the defrag driver caused a system crash/reboot on both laptops. If it had just been 1 laptop I would have put it down to the machine, but 2 out of 2 makes me somewhat wary of this app.
I find the user interface limiting and lacks feedback. Almost childlike in it's design.
Speed, huh? It took UltraDefrag almost 45 minutes just to ANALYZE a 150GB partition that had 35% free space. (Running Vista Business) Actually, I STOPPED it when it reached 70%. Yeah, it only got to 70% complete in 45 minutes. I'm not talking about the freakin' defrag time... no no no... just to A-N-A-L-Y-Z-E the drive. There was no way in hell I was going to actually run a defrag after waiting 45 minutes... and even at that point it was only reporting 3 fragmented files. WTF?!?!? If I didn't know any better (and if it wasn't September) I'd say this was some kind of sick April Fool's joke.
And so on, and so on... Saw no favourable comments whatsoever.