That was also about the OP who is in the other thread. Not about you.

Again, I apologize for the confusion.

shivam,
NavyLCDR was quoting my reply in the other thread.
https://www.tenforums.com/windows-updates-activation/39189-windows-10-pro-upgrade-windows-8-1-pro.html#post552029

My last reply is NOT...

.............I find it odd that you would disagree on this thread when you wrote on another thread:......................

That is because this OP is on Win 10 all the time. He did not say " I want...

I disagree.
Sorry.

The Media Creation Tool is used to one of the followings:
1. Download the ISO file.
2. Install Windows 10.

The key point is not about downloading and installing Windows 10, the key point is...

OK. Thank you.
In that case you can revert back to Win 8.1 provided you have not deleted the windows.old from your C drive.
Left click at Start button > left side, click Settings > select Update &...

I beg to differ.
1. The OP's first question is if it is possible to roll back to Win 8.1
Depending on how the OP defines the term " roll back".
If the OP meant using the built-in Go Back to...

Feb 11th ?
Win 10 RTM did not come into being until July 29th, 2015.
Before that, we only had Windows Technical Previews which later renamed to Insider Previews.

Sure you have the date right ?