I tried to use Windows 7 defragmenter but found that it was extremely slow. I just downloaded Diskeeper 2009 Home trial version for Vista and installed it on my hard drive with Windows 7 Beta. It installed with no problem and I am defragging Windows 7 partition now. Does anyone know how many passes the Windows 7 defragment program makes during a routine scan? Before I stopped the dragmentation process, I was on the second pass and nothing seemed to be happening (pass 2, 0% complete). After sometime I cancelled the Windows 7 defragmentation process and went to the Diskeeper site to download Diskeeper 2009 Home trial version. I use Diskeeper 2007 with Vista and it works very well.