-- Posted by Pink Cloud Assembly at 4:51 pm on June 15, 2009 what exactly does that mean? how do you do it, what does it do? -- Posted by carelesmind at 4:55 pm on June 15, 2009 it compresses files that arent used 24/7 -- Posted by killabyte0 at 5:00 pm on June 15, 2009 fail fail fail fail fail u all suck when you download a file be it music movie game application or other it uses space on your hard drive because ur harddrive is in constant use the arm inside it is all over the place so to save time it just plops the info anywer it finds a free sector when your hard drive becomes 80% full you will start to notice a drop in the speed of your computer loading things ths is because the drive has to peice together all the bits of the file you are trying to load when you defragment the program reads the files on your computer and puts all the bits side by side thus making a complete file and helping your pc and hard drive run faster -- Posted by twyne at 10:38 am on June 16, 2009 Defragging is a process where fragmented files are put back together in an organized sequential order so that the HDD can read them faster. To defrag, go to start>accessories>system tools>diskdefrag I defrag using Diskeeper, which is an automatic defragger that runs in the background, unlike the Windows defrag you dont need to defrag manually or schedule tasks. Very cool -- Posted by anonomouse at 1:30 am on June 30, 2009 The easiest way to launch it is to go to Start>Run then type in "dfrgui.exe" (without the quotes). Here's a good summary of what defragging is: http://www.wisegeek.com/what-is-defragmenting-a-computer.htm -- Posted by Charolastra at 2:26 pm on July 4, 2009 The way computer files store themselves in memory is a very "fragmented" process. If you start off with a cleanly installed computer that's only occupying 10% of the total disk space, any new files you install will be stored in successive memory banks. Let's say you keep installing stuff until your disk is about 80% full and now you realize that you should probably clean up your computer more and you go ahead and delete off a bunch of files that you hardly ever use until your disk is only about 50% full. However since you don't know which memory banks these files were in, chances are you've probably deleted bits of data from all over the place, so the next time you want to install something on your computer, anything you install will be stored in bits that are all over the physical harddrive. The computer now has to work harder to piece all of these bits together by jumping around. This can overtime slow down your computer very noticeably. To correct for this, it's a good idea to defragment your disk drive from time to time so that all the relevant data is once again assembled consecutively to avoid the extra effort, which helps to speed up whatever process you're running. If you're on a Windows platform, you can defragment by clicking Start -> Run -> dfrgui, or it should be under Accessories under System Tools. Run the program and it will analyze and defragment your computer for you. The best way to do it is overnight when you're a sleep because at times this process can take over 2-6 hours, depending on your CPU speed and the amount of memory you have available and have used. Hope this helps.