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Unable to enable .Net Framework 3.5 with error 0x800700C1

Sammi Dailey 0 Reputation points
2025-11-15T14:03:51.9133333+00:00

I am trying to run my Sims3 game, but when I attempt to launch it, I get a Windows Feature pop-up that says that .Net Framework 3.5 cannot be installed with error 0x800700C1:User's image

I then try to enable the .Net Framework 3.5 by checking the boxes in the Windows Features:

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When I click okay, it attempts to install, but I receive the original error code again, 0x800700C1.

I have run all Windows updates, with the following errors:

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I then attempted to reisntall Windows 11 Home, but I partway through the install, I received the error message stating my PC is not supported yet on this version (25H2) of Windows. I'm currently running version 23H2.

Below is my device and OS specs:

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Can someone tell me what I'm missing or doing wrong?!

Developer technologies | .NET | Other

2 answers

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  1. Harry Vo (WICLOUD CORPORATION) 3,390 Reputation points Microsoft External Staff Moderator
    2025-11-17T04:06:47.7666667+00:00

    Hi @Sammi Dailey , thanks for reaching us on Q&A platform!

    Your question is similar to this one: https://learn.microsoft.com/en-us/answers/questions/5520411/error-code-0x800700c1-when-installing-windows-11

    You can follow the accepted answer in that thread to see if the problem can be resolved.

    I hope you can solve your issue soon!

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  2. Ramesh Srinivasan 173.1K Reputation points Volunteer Moderator
    2025-11-18T02:09:33.9766667+00:00

    Here's the fix for your system based on the logs submitted.

    (Do not run this fix on other systems.)

    • Download SFCFix.exe by niemiro of Sysnative forums, and save this to your Desktop.
    • Download the file, SFCFix.zip, and save this to your Desktop. Ensure that this file is named SFCFix.zip - do not rename it.
    • On your Desktop, you should see two files: SFCFix.exe and SFCFix.zip. Drag the file SFCFix.zip onto the file SFCFix.exe and release it. See illustration image
    • When you see the prompt "Will you allow SFCFix to communicate with Sysnative servers?", type "n" for no. Press Enter to continue.
    • SFCFix will now process the script. It will take some time to complete. Upload the output file SFCFix.txt to your OneDrive.
    • Restart Windows and try running the following command:
    
DISM.exe /Online /Cleanup-image /Restorehealth

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