2.08.373 (Nov 28, 2011)
I am a MyDefrag acolyte, but I found it quite effective.
Comparing to MyDefrag, this program shines into handling file with some access restrictions (user access rights).
If you don't like the installer (i always saw confirmation to install Chrome), you can always get the portable version.
3.60.1016 (Jan 11, 2011)
On my WinXP.sp3 i have started it, it has installed a driver and asked me for a reboot.
I rebooted, and.... bang... BSoD on 'tm.sys'.
I had to remove this driver into safe mode from my "\system32\drivers" folder.
A very disappointing experience. :(