Optional features

My Windows 10 OS is 10.0.19041.329.
I noticed when I want to bring up "OptionalFeatures" the opened window stays blank not getting populated with either enabled or disabled windows features.
I am interested at least to see there Microsoft.NET 3 or 4.5 features.
I tried to exercise command : DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:C:\ESD\
Windows\Sources\SxS, where are the installed Microsoft.NET 3 and 4.5 files but in DISM log file I found
that was encountered an unknown option "featurename" with value "NetFx3" and unknown option source with value
"C:\ESD\Windows\Sources\SxS". Besides that I am getting an error 0x800F0805.
DISM Image CheckHealth does not discover any damages in system files.
Have I missed any other troubleshooting steps ?

@Terrier hello and welcome to TF,
Step one if your PC works well now: Backup and Restore with Macrium Reflect

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Then if I understand you correctly, you could try to install: KB4580419 Cumulative Update .NET Framework 3.5, 4.8 Windows 10 Nov. 10

Terrier said:

Hi Steve,

Why would I need in step 1 to backup and restore the image of my hard disk drive ? If anything is corrupted there the backup and restore will not help unless I do a clean installation of Windows 10 and losing my apps. I do not use Macrium but Acronis.
I will try to do the suggested cumulative update of .NET Framework advising you about the results.

Regards,

Macrium Reflect full backups restore your PC exactly back to the way it was when you made the backup.

Terrier said:

By the way, after installing OS 10.0.19041.329 last June on my machine I cannot install any later cumulative updates related to 20H1.

Given you are having multiple issues, I would suggest doing a repair install using an in-place upgrade, which reinstalls Window but keeps your personal apps and data.

Repair Install Windows 10 with an In-place Upgrade

If you don't have the 20H1 ISO, you'll need to download it from either Heidoc or TechBench.

Microsoft Windows and Office ISO Download Tool

TechBench by WZT (v4.1.1)

Article on both...

Where to Download Windows 10, 8.1, and 7 ISOs Legally

Microsoft is now only providing the 20H2 ISO through the Media Creation Tool.

I downloaded from the source HeiDoc.net - win10_2004_English_x32.iso file and tried to do an inplace repair. After about 45 minutes I got a message Windows 10 installation has failed. With error in setuperr.log 0x8007042b (failed to install )
I am not sure should I do another try but deleting folders $windows.~BT, $windows.~WT and renaming folder
SoftwareDistribution ?

@Terrier,
Did your PC have 32-bit Windows vs 64-bit Windows? You downloaded the 32-bit version.

Terrier said:

32-bit Windows.

Try Reset Windows Update in Windows 10

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More things to consider/try if that doesn't work: Windows 10 update error 0x8007042B [FIX]