OK, this may not seem like a big deal, but Microsoft has changed the Disk Defragmenter utility in Windows Vista with Service Pack 1 (SP1). In the original shipping version of Windows Vista, the Disk Defragmenter (as described in this Feature Focus article) was completely automatic: It would defrag all of your partitions, every night, starting at 1:00 am. This seemed like a great idea to me, but apparently some users complained that they’d prefer to have the ability to choose which partitions were defragged. That ability was added with SP1.

So, if you haven’t ever looked at Disk Defragmenter in Windows Vista, do so now (Start Search, "defrag") and make sure it’s set up to automatically defrag your disks. If you have looked at, but have installed SP1, make sure you’re defragging only those disks you wan to defrag.