Hey Guys im new to the forums so just wanted to introduce myself first of all. Im Razor nice to meet u all. Anyways i have found this freeware disk defragmenter its only 1.41MB zipped when i install it and look at the folder under program files i dont notice any registry entries so i think it will run from a USB KEY i think its a great lil program i use it instead of the standard windows xp disk defragger. can sombody please check it out and see if they can make it a portable app. There is also a OPTIMIZE function in the app but i think thats for the paid users once u upgrade but the actual defragging functionality of the program is free. please go to http://www.auslogics.com/disk-defrag/ and check the program out i hope it is ok fopr me to post website links. if not then a admin please feel free to remove it. regards razor