Win 10/1909 Unfinished Install

I have had Win 10/1909 installed and working on a Dell Precision PC that originally was intended for another purpose. Unfortunately, I don't like the PC's name I entered during the original W10/1909 installation and want to change the PC's name. I want to start using the PC in question as my general use PC.

Although this problem probably has come up in the past, how do I change the name of the PC I previously entered. My apologies if the answer to this question is already in the archives somewhere, but I couldn't find it. At 83, nothing comes easy any more so please treat me as an only moderately sophisticated user. Oh yes, I still have the ISO disks for several Win 10 versions including 1909 as installed on this PC.

Other than the W10/1909 files, there has nothing else been loaded on HD of the PC in question. Thank you, in advance, for advice, assistance, and/or instructions on how to proceed.

When I went to change the name I had entered for the PC in question, I discovered that I hadn't noted the password I had assigned when I first installed Win 10-1909.

What is the best way to start the installation over? Can I simply turn the PC on and tell it to boot from a 1909 DVD I have and reinstall everything from scratch? There is nothing presently loaded on the PC other than the original W10-1909 files so there are no files i have to worry about saving (so far as I know).

Thanks, in advance, for any and all advice and suggestions on how to proceed.

That will work. Has Windows 10 already been activated on this computer? It it has then it should automatically reactivate again.

BTW, is there any reason why you are running such an old version of Windows 10?

I am still with W10-1909 on the PC at issue because the computer hasn't been in use and 1909 is what I first loaded and activated.

If I simply load W10-1909 again as a new install on top of the original W10-1909 installation, will it pick up the original activation, do I have to get that code somehow, or do I have to do all the activation process again?

Thanks for your response.

Once a computer is activated with Windows 10 it will reactivate again automatically if Windows 10 is reinstalled.

If you are going to reinstall Windows 10 anyways you should do so with the latest version of Windows 10 which is 21H1. The only exception I can think of if you is if you have a real old computer that will not work on any version of Windows 10 newer than 1909.