How to Fix CLR20R3 Error in Windows 10/11?

The CLR20R3 error appears while launching a program on Windows. It is generally caused due to program file corruption or missing components. It prevents you from opening the application installed on the PC.

CLR20R3 Error on Windows 11
CLR20R3 Error on Windows 11

Follow the solutions below to fix the CLR20R3 error.

1. Download the Program from the Official Site

The following error commonly occurs when downloading an app from an unofficial website or any third-party source. If that’s the case, it is recommended to download the program from the official website and then install it on your Windows system.

Moreover, you can also uninstall the particular problem causing the error and then reinstall it completely from the official website. 

2. Run Program in Compatibility Mode

In Windows, the compatibility mode allows old or incompatible programs to run on the latest Windows system without any problems. Doing this will make older programs run on a newer operating system using a compatibility mode. Therefore it is advised to run the program in compatibility mode and make it perform well without showing any errors. Follow these steps to provide program compatibility rights:

  1. Right-click the program, choose Properties from the menu, select the Compatibility tab, select Run this program in compatibility mode and select the Windows version.
    CLR20R3 Error Windows 11
    Select Run this program as administrator.
  2. Right-click on the program and choose the Open file location option.
  3. Save your changes, launch the program causing the error and check if the error is fixed.

3. Install .NET Framework Version.

Some programs might not function properly on your PC if an older version of the .NET Framework due to incompatibility issues. In this situation, you will need to download and install your computer’s most recent version of the .Net Framework.

  1. Visit the Microsoft official page on the browser and download the latest .Net framework.
    CLR20R3 Error Windows 11
    Download Microsoft .net framework
  2. Run the installation setup to install the framework.
  3. After the framework has been updated, restart your computer. Check to see if the program is opening.

4. Update Windows

If you are using an early build or beta version of the Windows 11 operating system, problems like these may frequently occur because early builds and betas have a lot of faults and flaws. Therefore, updating the most recent Windows OS build is advised. Follow the instructions below to update Windows to the most recent build:

  1. Press the Win + I keys together to open the settings app.
  2. Now select the Windows Update option from the list on the left.
  3. Select the Check for Update option, and Windows will look for and download any available updates.
    CLR20R3 Error Windows 11
    Click on Check for updates
  4. Wait for the procedure to complete and restart your computer.

So, these solutions work for you to fix the clr20r3 error in Windows 10/11.


Hardeep Kaur

Hardeep is a passionate technical writer with more than 7 years of experience. She has a keen interest in PC games, Windows OS and everything surrounding it. She is a technology enthusiast and fascinated with technology since her childhood days.