Reposted with Clarifications:
On my 7 computers, all using Windows 7 Home Premium and Internet Explorer, all fully updated, the newest version (2.19) of Defraggler does not defrag; it goes from Analyze, briefly through Defrag, then right into Disk Performance, without defragmenting the C drive. Several of my drives were in the high teens as a percentage of fragmentation, yet it refuses to address them. This is the first problem that I have ever had with Defraggler. George
PS I have just discovered that if I click on Quick Defrag using the carat at the Defrag Button, it does defrag. Huh! I have never used Quick Defrag before!