Yes, you can cancel the defragmentation process before it is complete. It is probably a good idea to re-run the defragmentation at some point in the future, but failure to do so will not harm your computer.
Disk Defragmenter
Disk Defragmenter
Notepad and disk defragmenter do not use the same resources. However, Notepad can be used to open disk defragmenter from the system file.
disk defragmenter
The Disk Defragmenter can be found by pressing the windows button + R and then type "dfrg.msc" without the quotations.
Disk Defragmenter is a very slow program on most computers so it is reccommended that you do not open programs while it is running, or else there is a high risk of crashing your computer. It makes disk defragmenter goes even slower, which would probablly result in crashing the computer.
To open Disk Defragmenter, click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Defragmenter.
disk defragmenter
juy
Disk Defragmenter, Disk cleanup and a portable hard drive.
Go to Start then all programs, put your mouse on accessories then system tools and click on Disk Defragmenter. It moves around files on your disk so that they are not so spread out so your disk has to spin less.
If you have a Windows system, there is already a disk defragmenter installed onto the computer. Just click on the Start button and in the search box enter "disk defrag". Click on the program labeled Disk Defragmenter. To be able to defrag a disk, you need administrator rights.