I have LESS free disk space after defragmenting.

Before using Defraggler to defragment my C drive, I had approximately 100gb of space left.

After using Defraggler to defragment my C drive, I now have approximately 69gb of space left.

After telling Defraggler to Analyze my C drive a second time, it's telling me that its MORE fragmented than before.

This is extremely frustrating, I was under the impression defragmenting was NOT suppose to decrease free disk space.

I run windows Vista 64 if that matters.

Help would be much appreciated.

It seems Vista have created some Restore Points prior to defragmenting. Is there a disk cleanup utility under Vista? I am running XP.

There's no point in deleting Restore Points. They are automatically deleted if space is needed anyway. :)