Large SSDs are not an option for me yet. Too expensive. So I am still in the defragmenter market. I tried Diskeeper, Perfectdisk, Ultimatedefrag, and O&O Defrag. All good, though one of them put a piano sonata in the boot section! O&O's seemed the more intelligent (as of 2012). You can group files logically on the disk. Not just the "what-was-used-last-will-be-put-on-the-outer-rings" type of organization (which has its merits). For instance, one grouping could be: Operating system files, Application software, Personal data and files, Very rarely used data (like backups). Each area is followed by a block of free space for future writing in that group. The idea is to reduce heads movement. If you open software X, all its files are next to each other for a quick scoop. If you're backing up gigabytes of personal data, they would all be lumped for quick writing or quick retrieval. And so on. Disk operations are actually messier than that, but I saw siginificant speed improvements. (Control Panel builds faster in XP; ditto for Add and Remove software window). O&O Defrag's drawback. After completing a full multi-hour in-depth defragmentation, I expected little additional work if I defragmented again. No. It would just go back into full battle mode again, for hours--even though I did not change the file organization plan. Ridiculous, in the wear-and-tear department. I am still looking. What's new? Wilders being primarily about security, maybe there's a more appropriate forum for such administrative issues?