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I have tried too many ways to solve the issue but it always end up with the same line "The system cannot find the file specified." the error 0x80070002
i have tried this method by the way (didn't work) https://www.kapilarya.com/how-to-enable-net-framework-3-5-on-windows-10 (got the same error).
On the local machine go to Edit Group policy>> Computer Configuration>>Administrative templates>>System
on the drop down list scroll almost all the way to the bottom and select Specify settings for optional component installation.....
in this window select Enabled and check the box Download repair content and optional features directly from Windows....
next search turn windows features on /off and check 3.5 framework allow windows to find updates.
Once its done updating be sure to disable this setting in local group policy.
Hope this helps
Hello,
If you have OS ISO file with you then you can copy the dot net file from here **D:\sources\sxs\ and copy somewhere in the sharable path to become accessible via UNC path.
doesn't work,windows still got issues with finding files "The system cannot find the file specified."
See if running the net framework repair tool makes any difference.
Reregister Windows Installer service
Unregisters and re-registers the Windows Installer service using MsiExec.exe. Applicable regardless of the diagnosis results.
Restart Windows Installer service
Stops and restarts the Windows Installer service. Applicable regardless of the diagnosis results.
https://www.microsoft.com/en-us/download/details.aspx?id=30135
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After reading your massage i followed your instructions but...didn't work and i tried some other solutions and still the same error (i deleted my last comment)
by the way this is the log of DISM for last used command 
For better view open the image
1) Run:
(bat scripts by design prompt antivirus software and require manual overrides)
Post a share link into this thread using one drive, drop box, or google drive.
2) Open administrative command prompt and copy and paste:
msdt.exe -id WindowsUpdateDiagnostic
Click view detailed information > post images or share links into this thread
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.
.
Please remember to vote and to mark the replies as answers if they help.
On the bottom of each post there is:
Propose as answer = answered the question
On the left side of each post there is /\ with a number: click = a helpful post
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.
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.
Hi there,
The error code "0x80070002" often means the file or folder cannot found, you could take the following methods to see if there are any system errors and repair missing or corrupted system files.
Open an elevated command prompt.
Run the "sfc /scannow" command.
Open an elevated command prompt.
Run the command:DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess
Replace the C:\RepairSource\Windows placeholder with the location of your repair source.
I hope this information helps. If you have any questions please let me know and I will be glad to help you out.
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Still there is a problem with finding sources
On the local machine go to Edit Group policy>> Computer Configuration>>Administrative templates>>System
on the drop down list scroll almost all the way to the bottom and select Specify settings for optional component installation.....
in this window select Enabled and check the box Download repair content and optional features directly from Windows....
next search turn windows features on /off and check 3.5 framework allow windows to find updates.
Once its done updating be sure to disable this setting in local group policy.
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Hello dear, just try another way that is to download the setup of .NET framework from a browser and install it. Then restart and check if the issue is resolved.
So guys...got any other ideas?