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Windows Features - Unable to Check Microsoft .NET Framework 3.5.1

    Question

  • Whenever I try and check the box to turn on the .NET Framework I receive the following error message:

    Windows Features

    An error has occurred. Not all of the features were successfully changed.

    I am running Windows 7 Ultimate 64-bit and have used the .NET validation tool to verify that the .NET framework 3.5.1 is on my machine. Any idea what could be causing this error? Any help would be greatly appreciated. Thank you!

     

    Monday, June 07, 2010 2:26 PM

Answers

  • I just ended up doing a repair install since nothing was working that was suggested - everything seems to be fine now.
    • Marked as answer by ndfan1993 Friday, June 11, 2010 6:39 PM
    Friday, June 11, 2010 6:38 PM

All replies

  • When you go on Turn Windows Feature on or off, if you see Microsoft .Net Framwework 3.5.1, it means this version is installed.

    By default the .Net Framework is installed in Windows 7. No need to worry for this version!

    Monday, June 07, 2010 3:19 PM
  • I thought the box next to it needed to be checked, is that not the case?
    Monday, June 07, 2010 4:47 PM
  • By default the box Microsoft .Net Framwework 3.5.1 is checked if not check it

    Check this picture to see what i'm talking about http://windows.microsoft.com/en-us/windows7/Turn-Windows-features-on-or-off

    • Proposed as answer by ejhewitt Friday, April 12, 2013 10:39 PM
    Monday, June 07, 2010 4:56 PM
  • copy the file "C:\Windows\Logs\CBS\CBS.log" to your document folder (otherwise you can't open it) and open it with notepad. Now search for errors. Which errors do you see?
    "A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/
    Monday, June 07, 2010 8:55 PM
  • Here is the file: https://cid-d2a7ef1a038b6514.skydrive.live.com/self.aspx/.Documents/CBS.log
    Monday, June 07, 2010 11:43 PM
  • Hi,

    Can you turn on/off other Windows Features?

    If only the Microsoft .NET Framework 3.5.1 encounter this issue, it is suggested to uninstall it using a Windows cleanup utility and reinstall it. Simply run this tool, hit Cleanup Now button, select ".NET Framework - All Versions (Windows 7)" and .NET Framework will be completely uninstalled from your system.

    Then download it again from this website: http://www.microsoft.com/downloads/details.aspx?FamilyID=ab99342f-5d1a-413d-8319-81da479ab0d7&displaylang=en

    Regards,


    Magon Liu - MSFT
    Thursday, June 10, 2010 9:34 AM
    Moderator
  • No, I get the error whenever I try to turn on/off any Windows Feature.
    Thursday, June 10, 2010 11:42 AM
  • You got an STATUS_SXS_ASSEMBLY_MISSING error, so a file is missing in the WinSxS folder.

    Please download and run the System Update Readiness Tool for Windows 7 (KB947821) [April 2010].

    When the tool is finished it creates a file checkSUR.log in the folder C:\Windows\logs\CBS. Open that file and look if the tool was able to fix all missing files.


    "A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/
    Thursday, June 10, 2010 8:42 PM
  • After running the above mentioned tool here is what I found in the log:

    ==============================

    Checking System Update Readiness.
    Binary Version 6.1.7600.20667
    Package Version 8.0


    Checking Windows Servicing Packages

    Checking Package Manifests and Catalogs

    Checking Package Watchlist

    Checking Component Watchlist

    Checking Packages

    Checking Component Store

    Summary:
    Seconds executed: 284
     No errors detected

    Thursday, June 10, 2010 8:52 PM
  • Hi

    Try the the System File Checker tool (SFC.exe). Run the following command in Start menu search bar, and then press ENTER:
    sfc /scannow

    The sfc /scannow command scans all protected system files and replaces incorrect versions with correct Microsoft versions.

    Refer the following link for more information:

    How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7

    http://support.microsoft.com/kb/929833

    Regards,


    Magon Liu - MSFT
    Friday, June 11, 2010 9:57 AM
    Moderator
  • This is confusing. The log says, parts of the SimpleTCP functions are missing.

    The last chance is to use sfc /scannow.


    "A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/
    Friday, June 11, 2010 3:15 PM
  • I just ended up doing a repair install since nothing was working that was suggested - everything seems to be fine now.
    • Marked as answer by ndfan1993 Friday, June 11, 2010 6:39 PM
    Friday, June 11, 2010 6:38 PM
  • how did you do the repair install?
    Wednesday, October 12, 2011 10:33 PM