Hello. Yes, I have read your previous post. The fragmented percentage reading for each one of the four computers I have tested is: 18%, 25%, 9%, 13%. By the way, I have been progressively stepping up the installed Defraggler versions in order to find where the bug started. So far I am in version 2.17.898 and it is still working OK, so the bug has arisen somewhere between the next one and the latest 2.19.xx.