Simply stating that you don’t recommend a particular action or piece of hardware or software without leaving any qualifying reason is not helpful in the slightest.

Just one concern,isnt registry cleaning a helpful in this case?if yes,which one would u recommend?

You’re absolutely right about there’s a lot more that goes into what makes your computer slow. If you notice at the bottom of the guide there’s a link to another guide that has an entire series of guides that show you how to speed up your computer.

You’re also absolutely right on how defragmentation happens. I had a very bad choice of words and didn’t explain how it worked correctly.

I’ve updated the guide to fix it’s errors.

Theres way more than just fragments (which isnt really that big a problem on an NTFS disk, in fact ive read opinions of people to not even defrag on NTFS as its help is near nothing) Speaking of fragmenting as childrens toys? come on, thats not even near how it works, fragmented files dont get LOST, they are just out of order and pc has to look for all parts in different places, hence the slower performance.
If your gunna write an article, write a good one