How to Fix .NET Framework Error 0x800736B3 on Windows 10?

Question

Issue: How to Fix .NET Framework Error 0x800736B3 on Windows 10?

I’ve recently upgraded from Windows 7 to Windows 10. About a week after that I tried to run a game and got an error saying that I don’t have .NET Framework 3.5 installed. Then I tried to install the .NET Framework 3.5, but each time ends up with the error message saying: Reference assembly not installed in the system, error 0x800736B3. Have no ideas what should I do. Could you please help? Thanks!

Solved Answer

.NET Framework is a software framework developed by Microsoft, which encompasses a class library[1] known as Framework Class Library (FCL). It consists of thousands of pieces of shared code, which serve software developers so that they can use the code to perform some common functions.

Microsoft explains that:

.NET framework is a technology that supports building and running the next generation of applications and Web services.

Earlier Windows versions, including 7,[2] 8, 8.1 and others did not have this technology pre-installed, so people had to install it manually if needed. Windows 10 OS come with .NET Framework 3.5 by default, but it sometimes happens that .NET software fails to install during the upgrade or update of the operating system.

.NET Framework Error 0x800736B3 fixUse this guide to fix .NET Framework Error 0x800736B3

Consequently, a PC’s owner receives an error code “Reference assembly not installed in the system. Error Code: 0x800736B3.” If you recently encountered this issue when, for example, trying to launch a game, you can try to perform .NET Framework Error 0x800736B3 fix as explained below.

Because .NET Framework 3.5 is required for most modern games to run or even start and is a standalone component, installing it anew should fix 0x800736B3 error. However, many users reported that they struggle with the installation of it, as it drops the same error. Therefore, please perform steps 1 to 3 if you are having problems with the installation of .NET Framework 3.5.

Method 1. Uninstall Microsoft .NET Framework 3.5 updates

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  1. Right-click on Windows key + I to open Settings app.
  2. Select Updates and Security and click Update history.
  3. At the top of the page, click on Uninstall updates and look through the list of installed updates.
  4. Find the latest cumulative update the installation of which triggered the error 0x800736B3.
  5. Right-click on it and select Uninstall. Uninstall .NET Framework updatesThis option is only a temporary solution

NOTE: It’s not advisable to have an outdated operating system due to the risk of infections and various malfunctions. This method can be applied only as a temporary .NET Framework 3.5 error 0x800736B3.

Method 2. Use Group Policy Editor

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  1. Press Windows key, type gpedit.msc, and press Enter.
  2. Once Group Policy Editor opens, navigate to Computer Configuration > Administrative Templates > System.
  3. Look for Specify settings for optional component installation and component repair option on the right pane.
  4. If it is set to Not Configured, double-click on it, set Enabled.
  5. After that, enable Contact Windows Update directly to download repair content instead of Windows Server Update Services (WSUS) and click OK. Edit local group policyPerform the following changes to local group policy

Method 3. Use the inbox Deployment Image Servicing and Management (DISM) tool

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  1. Press Windows key and type Command Prompt or cmd into the search box.
  2. Select Command Prompt from search results, right click on it an pick Run as administrator.
  3. If you are prompted for an administrator password or confirmation, type the password or press Allow.
  4. Copy and paste DISM.exe /Online /Cleanup-image /Restorehealth and press Enter.
  5. If the Windows Updates service that provides required files is corrupted, you should use a Windows installation media or use a Windows side-by-side folder from a network share as a repair source. Insert the media and run the following command to the Command Prompt window:
    DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\\RepairSource\\Windows /LimitAccess
    IMPORTANT: instead of C:\\RepairSource\\Windows type the location of your repair source.
  6. The type sfc /scannow and press Enter. Let the scan complete.
  7. Then close Command Prompt and run Windows Updates. Use Command Prompt (Admin)Command Prompt (Admin) can help you fix 0x800736B3 error

TIP: when you fix 0x800736B3 error, it’s advisable to run a thorough system scan with FortectMac Washing Machine X9. Using an optimization tool is highly recommended to maintain Windows registry,[3] system files, security, and other problematic cases the damage of which may lead to further errors.

Method 4. Reinstall .NET Framework 3.5 entirely

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To repair damaged system, you have to purchase the licensed version of Fortect Mac Washing Machine X9.

Once you completed Method 3, you should try to reinstalling .NET Framework and see if it fixed .NET Framework Error 0x800736B3:

  • Go here to download the executable of .NET Framework 3.5
  • Pick your language and click on Download
  • Follow the on-screen instructions to finish the installation Reinstall .NET Framework 3.5As soon as all steps above are complete, reinstall .NET Framework 3.5

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Gabriel E. Hall
Gabriel E. Hall - Passionate computer expert

Gabriel E. Hall is an expert troubleshooter who has been working in the information technology industry for years.

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