After running Defraggler, the percentage of fragmentation increased from 6% to 10%. I am running 64-bit Win7. Defraggler worked well on my Vista laptop, but this is the first time I've run it on my new Win7 computer, and I am baffled. Does anyone have any clue what is going on here?

What are the fragmented files ( in the File List tab) ?

2 files in C:\System Volume Information (long alphanumeric strings)
1 file in C:\Program Data\Microsoft\RAC\StateData
and 2 files related to my antivirus program (which I did not turn off while defragging).

Thank you!

Files with weird names in C:\System Volume Information\ are Restore points. You can't defrag them - and it would be pointless.
I think your antivirus's self-protection prevents defragging its files.
The file in C:\ProgramData\Microsoft\RAC\StateData has something to do with Vista's performance and reliability monitor

Thanks for your help. I guess it isn't anything I can do anything about, then, although I am still puzzled about why the percentage of fragmentation increases, even if most of the files in the "fragmented" list disappear, and the only ones remaining can't be defragged. Oh well.

"Files with weird names in C:\System Volume Information\ are Restore points. You can't defrag them - and it would be pointless.
I think your antivirus's self-protection prevents defragging its files.
The file in C:\ProgramData\Microsoft\RAC\StateData has something to do with Vista's performance and reliability monitor"



I don't get it. Just because you can't defrag some particular files you should always, then, have some fragmented files present but their number sure shouldn't INCREASE each time you run the program. I use Vista Home Premium and have used only about 20% of my HD space so fragmentation might not have any real impact on my system's operation or performance, I don't know, but I should still be able to reduce the number of fragmented files down to some specific, fixed number.