Free defragmenter software for windows

Power Defragmenter is a very advanced GUI for the Sysinternals core application which takes defragmentation process to a whole new level.
Power Defragmenter is a GUI (Graphic User Interface) application for program Contig by Sysinternals.
Contig is a very powerful defragmentation application designed for Windows NT/2000/XP operating systems.
Contig created by Mark Russinovich and Bryce Cogswell.

Buzzsaw On-The-Fly Defragmenter allows you to defragment your drive while you work.
Buzzsaw had on-the-fly defragmentation before any defragmentation program on the market made it available. This program runs at idle priority so you can continue working without Buzzsaw using your valuable CPU time. It watches the drive for modified files and waits approximately 60 seconds before defragmentation begins.
It waits, because you may be downloading a file, etc. and there is no need to defragment the file if it is going to be modified again shortly. If you are a developer, you may be compiling files, or saving files frequently which is another reason for delayed defragmentation.

AutoDeFrag is a launcher for the standard defragmenter built into Windows 2000. The standard defragmenter does not support the ability to be scheduled, and therefore must be manually launched when required, once for each fixed disk in your system. AutoDeFrag works around this limitation and allows the Windows 2000 Task Scheduler to be used to schedule the defragmenter. By default, lunching AutoDefrag will defragment all drives, however you can specify in the command line, if you only want a selected drive defragmented. Very simple tool, but a great aid in maintaining performance.

Start programs is a free software that allows you to start several programs at one time. It will be useful if you want to start 10 program at one time. This software story tunings.
Description: Program starter combines, in a single executable, functions which as a rule you only get by installing several programs. It has many built in functions like immediate or scheduled shutdown/restart/logoff/standby/hibernate, launch default browser or email client, open explorer, display important info about your computer like IP address, memory usage and so on, defragmenter your computer and shutdown, open/close CD drive, empty the recycle bin or/and delete files or folders at startup, delete index.dat files, backup or synchronize directories, rename multiple files, fix window on top, enable or disable your screensaver etc.
One can choose which programs are allowed to run when Windows is starting up.

What is Complete Registry Cleaner? Complete Registry Cleaner is a utility software to make your computer run smoother and faster. How does Complete Registry Cleaner achieve this? Complete Registry Cleaner achieves this by cleaning and compressing the registry. What is registry? Registry is a database where Windows and programs store their data. Why do I need to clean the registry? When data changes i.e. you delete a file, the registry doesnt remove the invalid data, thus in this case a reference to a non-existent file remains in the registry. As the registry gets filled with invalid data, Windows and programs consume more system resources to search the database for any data. Therefore your computer gets slower and slower. Last but not least, passing invalid data to Windows programs can cause severe system complications resulting in system crash, hang and malfunction. Why do I need to compress or defrag the registry? After a registry cleanup the invalid entries leave empty spaces, which means the size of the registry remains unchanged. It goes without saying that loading a small registry is faster than a big one. What are the minimum requirements to run Memory Defragmenter? Complete Registry Cleaner runs on all versions of Windows and doesnt have any significant system requirement. One-click disk clean up, scandisk, disk defrag, registry backup, registry cleanup and registry defrag (requires Abexo defragmenter).