Revert To Build-1909 From Build-2004

NavyLCDR said:

It's never worked that way, unfortunately. Although, doing a custom install to a partition containing a Windows 10 is supposed to save user files in windows.old - but I wouldn't count on that as a backup.

https://answers.microsoft.com/en-us/...5-abecfbf68300

Bree said:

Registry setting changes are the problem. When you upgrade to a newer version Setup knows what all the old version's registry settings mean, and how they should be migrated. When you try to downgrade the newer registry settings are not understood by Setup so a clean install is the only safe option.

When performing an in-place 'downgrade' from 2004 to 1909 both the 'Keep....' options are greyed out.

Attachment 287051

Only when booting from the 1909 install usb and selecting the existing 2004 Windows partition as the install location will your previous (newer?) verison be saved to a Windows.old folder. You'll be able to retrieve your user files from there (but NOT any installed apps).

Attachment 287053

You're both right.
I did try to run setup with an older version and came with same message.

I have decided to upgrade my CPU i5-6600 > Ryzen 3600 since I am facing the prospect of a clean install and honestly I've been flirting with the idea of getting a Ryzen since the 3000 series were released so I guess there's no time like the present.

Lance1 said:

Well what you want and what you have is a problem. Your motherboard will not support the Ryzen 3600. GA-B150M-DS3H Compatible Components The links says D3H but Neither will the DS3H. Here's some suggestions Best Motherboards for AMD Ryzen 5 3600 in 2020 Just going by your posted specs. Not unless you upgraded. Good Luck.

Sorry I should have been more clear. I bought the 3600 earlier and I also pulled the trigger on a MSI Mortar Max B450 motherboard.

I know I am late to the party but here is another way to get older Windows 10 ISOs

How to download Windows 10 1909 ISO after 2004 releases
How to download Windows 10 1909 ISO after 2004 releases • Pureinfotech

RUFUS the same tool you use to make a bootable flash drive can also be used to downloads Windows 10 ISOs
I had the following choice of ISOs to download:

20H1 (Build 19041.264 - 2020.05]
19H2 (Build 18363.418 - 2019.11)
19H1 (Build 18362.356 - 2019.09)
19H1 (Build 18362.30 - 2019.05)
1809 R2 (Build 17763.107 - 2018.10)
1809 R1 (Build 17763.1 - 2018.09)
1803 (Build 17134.1 -2018.04)
1709 (Build 16299.15-2017.09)
1703 [Redstone 2] (Build 15063.0 - 2017.03)
1607 [Redstone 1] (Build 14393.0 - 2016.07)
1511 R3 [Threshold 2] (Build 10586.164-2016.04)
1511 R2 [Threshold 2] (Build 10586.104 - 2016.02)
1511 R1 [Threshold 2] (Build 10586.0 - 2015.11)
1507 [Threshold 1] (Build 10240.16384 - 2015.07)

Yep.

May need translation for some less experienced users.

19H1 (both) - 1903 (release 1 and release 2).

19H2 - 1909

20H1 - 2004

OldNavyGuy said:

Yep.
May need translation for some less experienced users.
19H1 (both) - 1903 (release 1 and release 2).
19H2 - 1909
20H1 - 2004

I checked a couple other sources for previous Windows 10 ISOs. The lists look about the same. I think these all may be old Preview Release versions not the actual Windows 10 Public Releases.

For example take "19H2 (Build 18363.418 - 2019.11". This was one of the last 1909 Preview Releases before the official 1909 Public Release.

They are the actual release versions.