Diskeeper is a program designed to replace the standard Windows defrag application. As anyone who knows a thing or two about computers will tell you, defragging your disk is essential. Over time you write a lot of 'stuff' on to your computers' hard drive. Windows does it's best to put a file into a single sector of the hard disk, but sometimes this is just not possible. The file is then split into several sections and placed in the next available sector of the disk. This is called a fragmented file. Over time, more and more files we become fragmented as they shrink and grow, get deleted or moved. Fragmented files take longer to read than the non fragmented brothers. So, the more fragmented files you have, the slower your PC will get...until you can stand it no longer and run defrag.

Install Notes:

After install, stop diskeeper service and copy files from Patch.zip into destination directory. Run keymaker (under Vista, YOU HAVE to right click and run it as Administrator) and press Generate Key.
Start diskeeper service, press cancel when the expiring message pops up, run application, in the menus you will find an option to enter license key,enter the previously generated key.
Then press Generate Code, copy code into application and restart.