I recently upgraded my Windows 10 Pro 1903 desktop to 1909. I downloaded the full 1909 ISO and run Setup.exe. The process went thru fine. However a program called 'Windows ISO Downloader' started giving Error 135. To my best understanding it occurs if required .Net framework is missing.
I looked into Programs and Features and Turn Windows feature On/Off and there was no .Net framework in the list. There are 3 options called, .Net, .Net Extensibility 3.5 & 4.8 which just do not get enabled. I mean I can tick them but after Windows does something they go back to unticked state.
There are no items like .Net 2 & 3.5 & .Net 4.8 under Programs.
I tried to download any recent Windows 10 updates but it now gives error 0x80d02014 so it's altogether another issue. I do not know the state of .Net framework in 1903 as I never needed it ever in 1903, so this might have been a pre-existing issue or might have been introduced after 1909.
Trying to install offline .Net 4.7 or 4.8 says that it's already installed as part of OS.
I tried to download and run a third party utility that shows what .Net is present and it returns nothing. Below are relevant screenshots.
Let me know if you have any further pointers for troubleshooting this issue. Clean install on Windows 10 might fix the issue but that's the last options. Looks like my current Windows 10 is in a total mess.
Edit
As suggested in comments I tried to use DISM to enable .Net feature but it returns Error 50. I ran CMD as admin. Unfortunately the contents of Log file are beyond my understanding.
I tried to reset Windows 10 but to my surprise it says your apps shall be removed. Similarly Repair attempt tells me that no files and apps will be kept. The option to select first 2 of the 3 options is grayed out.
I think there's something wrong with my Windows 10 1909 and I am still back to square one. I am sure clean install is going to fix it but it will be my last option.
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