My problem is similar in that after any program upgrades, my drive won't defrag 100%. Up until the last 2 days, I would uninstall the program, reinstall and then I would get 100% defrag. Not this time though. So I tried the defrag at boot time instructions and while it said 0% when done I could still see the red clusters. I then went back to the normal settings and I have 17% that isn't defragged and the file is 7.3 GB.
What now?
Thanks for your help.