Two years ago when I wrote about Diskeeper, I had high praise for the product that defragments your disk drives, connecting together files that had become split apart over time as you used your system. Now, with the release of version 10, I still think it's one of the best productivity purchases you can make for your computer as it can help you keep your systems running fast, even though you clutter your disks with files as you work.

Unlike the defragmenter that comes with Windows, Diskeeper 10 can be set to defragment your disk frequently -- and on a regular schedule. When it does, it uses new technology to do a better job to defragment, which according to the company can enhance your system performance by up to 80 percent in some circumstances. Even if it doesn't come anywhere near those numbers for you, if you have been using your system for a while, you'll probably notice a speed difference for applications that are throttled by your disk.

The latest version of Diskeeper has a revamped user-interface that you should be able to start using in just a few minutes after installing, and offers the ability to run in the background while giving your other applications priority. New reports allow you to see how well your defragmenting job did, and keeps track of the history of defragmentations you perform.

The product has several varieties that are suited to the needs of various businesses and home users. There also are administrator editions and server editions for more sophisticated users and companies that provide computer services. You can find out more at www.diskeeper.com and buy the software there or from a software dealer.

The Home Edition runs $29.95. Professional Editions start at $49.95 and go up to $999.95 for the Server Enterprise Edition.