I think I tried lo. I do not remember.

I tried perfect disk. I did not like it. I forget why.

I used Diskeeper lite which defraged some files during start up, which could not be moved while the PC is on. I loved it. They quit making the freeware version.

I like Auslogics, but it does not move files at start up.

I found the Vista defrag to be worse than XP's defrag. The reasons are above.