Defragment Your Windows 7 Computer

Defragmentation is available in Windows XP and Windows Vista, although there are some differences between the two. The most important difference is that Vista allowed scheduling of defragmentation: you could set it to defrag your hard drive every Tuesday at 3 a.m. if you wanted--though that is probably overkill and could do more harm than good. In XP, you had to defrag manually.

It's just as important to defrag a Windows 7 computer on a regular basis, but there are some new options and a new look. To get to the defragger, click on the Start button, and type in "disk defragmenter" in the search window at the bottom. "Disk Defragmenter" should appear at the top of the search results, as shown above.

If you've used the defragger in Vista and XP, the first thing you'll notice is the that Graphical User Interface, or GUI, has been completely redesigned. This is the main screen where you manage all your defragmentation tasks. In the middle of the GUI is a screen that lists all the hard drives attached to your system that can be defragmented.

This is also where you can schedule an automatic defragmentation, or start the process manually.

To automate defragmentation, left-click on the "Configure schedule" button. That will bring up the window shown above. From here, you can schedule how often to defragment, what time of day to defragment (night is best, as defragmenting a drive can suck up a lot of resources which can slow down your computer), and what disks to defragment on that schedule.

We recommend setting up these options, and having defragmentation done automatically; it's easy to forget to do it manually, and then you'll end up spending hours defragging when you need to get something else done.

The middle window, shown above, lists all your hard drives eligible for defragmentation. Left-click any drive in the list to highlight it, then click "Analyze disk" at the bottom to determine if it needs to be defragmented (fragmentation is shown in the "Last Run" column). Microsoft recommends defragmenting any disk that has more than 10% fragmentation.

One of the advantages of Windows 7's defragmenter is that it can defragment multiple hard drives simultaneously. In previous versions, one drive had to be defragged before another one could be. Now, drives can be defragged in parallel (i.e. at the same time). That can be a big time-saver if you have, for example, an internal hard drive, external drive, a USB drive and they all need to be defragged.