In simple words, defragmenting is putting files back where they use to belong. With the files in the proper order. By this the computer will work properly and smoothly.
3. Perform Disk Cleanup In your Computer
4. By Removing Spyware & Adware from computer
5. Wallpaper must be simple and plane
Check your wallpaper size which you setup to your desktop. Many wallpapers are big in size and space, These kind of wallpapers also let the computer to perform slowly because of the size of the wallpaper. Gif and animated wallpapers are harmful for the computer of low memory.
If you find the post helpful, then please comment. Thanks, have a nice day