Windows 7 built in defrag

The default automatic always running in the background defrag,
defrags File Fragments that are 64M and smaller.

Start here to get a handle on exactly what and why Defrag in Win 7 is much better.

Command Line Options:
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/A Perform analysis on the specified volumes.
/C Perform the operation on all volumes.
/E Perform the operation on all volumes except those specified.
/H Run the operation at normal priority (default is low).
/M Run the operation on each volume in parallel in the background.
/T Track an operation already in progress on the specified volume.
/U Print the progress of the operation on the screen.
/V Print verbose output containing the fragmentation statistics.
/X Perform free space consolidation on the specified volumes.

You don't need to defrag the registry.

I use Windows 7 defrag and it works fine for me.

Layback Bear said:

Thanks again for the post from all. I also use Windows 7 defrag, I was just wondering what it did or did not defrag.

Could'nt find what defragment does but surely a gain in knowledge.

Read this.

Hope this helped a bit.

Found a bit of Information

It does not defragment files residing in the Recycle Bin or files that are in use.
In particular, this includes the registry, page file and hibernation file.

This gives a overview.

Layback Bear said:

Thank you Tepid for the time you spent looking into that. Question; does it do registry.

It's important to distinguish between defragging the registry and cleaning it. I would strongly recommend staying away from registry cleaners, however I believe defragging the registry occasionally - once a month would be often enough - is helpful. It will recover some disk space and parse the registry, but you won't notice any difference in performance.

I use Quicksys Regdefrag for Windows 7 32 bit and 64 bit without problems.