How to Download and Install .NET Framework 4.5.1 for Windows 10
If you are a Windows 10 user, you may have encountered some applications or programs that require the Microsoft .NET Framework 4.5.1 to run properly. The .NET Framework is a software platform that provides a set of libraries and tools for developing and running applications that use .NET technologies, such as C#, VB.NET, ASP.NET, WPF, WCF, WF, and more.
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In this article, we will show you what is .NET Framework 4.5.1, why do you need it, how to download it from official sources, how to install it on Windows 10, and how to troubleshoot common issues with the installation process.
What is .NET Framework 4.5.1 and why do you need it?
The Microsoft .NET Framework 4.5.1 is a highly compatible, in-place update to the Microsoft .NET Framework 4 and the Microsoft .NET Framework 4.5. It was released in October 2013 and it is no longer supported by Microsoft since January 2016. However, some applications or programs may still require this version of the .NET Framework to run properly on Windows 10.
Features and benefits of .NET Framework 4.5.1
The .NET Framework 4.5.1 adds substantial improvements to other functional areas such as ASP.NET, Managed Extensibility Framework, Windows Communication Foundation, Windows Workflow Foundation, and Windows Identity Foundation. Some of the features and benefits of the .NET Framework 4.5.1 are:
Improved performance, reliability, and security
Support for asynchronous programming with async and await keywords in C# and VB.NET
Support for automatic binding redirection for assemblies
Support for portable class libraries that can target multiple platforms
Support for debugging Windows Store apps with managed code
Support for diagnostics tools such as EventSource and ETW
Support for ASP.NET app suspension that improves the responsiveness of web sites
Support for Entity Framework 6 that enables data access for applications
Support for Windows Store apps development with C# or VB.NET
Support for Windows Phone apps development with C# or VB.NET
System requirements and compatibility of .NET Framework 4.5.1
The system requirements for installing the .NET Framework 4.5.1 are:
Operating system: Windows Vista SP2, Windows 7 SP1, Windows Server 2008 SP2, Windows Server 2008 R2 SP1, Windows Server 2012, or Windows Server Core
Processor: Minimum Pentium III or equivalent CPU
Memory: Minimum 512 MB RAM
Disk space: Minimum 850 MB (32-bit) or 2 GB ( 64-bit) of available hard disk space
Internet connection: Required for web installer
The .NET Framework 4.5.1 is compatible with the following operating systems and platforms:
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Operating system
Platform
Windows 10
x86, x64, ARM
Windows 8.1
x86, x64, ARM
Windows 8
x86, x64, ARM
Windows 7 SP1
x86, x64
Windows Vista SP2
x86, x64
Windows Server 2012 R2
x64, Server Core Role
Windows Server 2012
x64, Server Core Role
Windows Server 2008 R2 SP1
x64, Server Core Role
Windows Server 2008 SP2
x86, x64, Server Core Role
How to download .NET Framework 4.5.1 from official sources
The .NET Framework 4.5.1 can be downloaded from the official Microsoft website or from the Windows Update service. There are two types of installers available: web installer and offline installer.
Web installer vs offline installer
The web installer is a small file that downloads and installs the required components of the .NET Framework 4.5.1 from the Internet. The web installer is recommended for most users as it saves disk space and bandwidth. However, the web installer requires an Internet connection during the installation process and it may not work if you have a proxy or firewall that blocks the connection.
The offline installer is a large file that contains all the components of the .NET Framework 4.5.1 and can be installed without an Internet connection. The offline installer is useful for users who want to install the .NET Framework 4.5.1 on multiple computers or who have a slow or unreliable Internet connection. However, the offline installer takes more disk space and bandwidth to download and install.
Steps to download .NET Framework 4.5.1 web installer
To download the .NET Framework 4.5.1 web installer, follow these steps:
Go to the .
Select your preferred language from the drop-down menu and click Download.
Save the file (NDP451-KB2858728-x86-x64-AllOS-ENU.exe) to your computer.
Run the file and follow the instructions on the screen to complete the installation.
Restart your computer if prompted.
Steps to download .NET Framework 4.5.1 offline installer
To download the .NET Framework 4.5.1 offline installer, follow these steps:
Go to the .
Select your preferred language from the drop-down menu and click Download.
Save the file (NDP451-KB2858728-x86-x64-AllOS-ENU.exe) to your computer.
Run the file and follow the instructions on the screen to complete the installation.
Restart your computer if prompted.
How to install .NET Framework 4.5.1 on Windows 10
The installation process of the .NET Framework 4.5.1 on Windows 10 is similar for both web installer and offline installer. However, there are some differences depending on whether you have an older version of the .NET Framework installed or not.
Steps to install .NET Framework 4.5.1 web installer on Windows 10
If you have an older version of the .NET Framework installed on your Windows 10 computer, such as .NET Framework 4 or .NET Framework 4.5, you can use the web installer to upgrade to the .NET Framework 4.5.1. Follow these steps:
Run the web installer file (NDP451-KB2858728-x86-x64-AllOS-ENU.exe) that you downloaded from the official Microsoft website.
Accept the license terms and click Install.
Wait for the installation to complete. You may see a progress bar and some messages on the screen.
Restart your computer if prompted.
If you do not have any version of the .NET Framework installed on your Windows 10 computer, you can use the web installer to install the .NET Framework 4.5.1. However, you will also need to install the .NET Framework 4.5 first, as it is a prerequisite for the .NET Framework 4.5.1. Follow these steps:
Go to the .
Select your preferred language from the drop-down menu and click Download.
Save the file (dotNetFx45_Full_setup.exe) to your computer.
Run the file and follow the instructions on the screen to complete the installation of the .NET Framework 4.5.
Restart your computer if prompted.
Run the web installer file (NDP451-KB2858728-x86-x64-AllOS-ENU.exe) that you downloaded from the official Microsoft website.
Accept the license terms and click Install.
Wait for the installation to complete. You may see a progress bar and some messages on the screen.
Restart your computer if prompted.
Steps to install .NET Framework 4.5.1 offline installer on Windows 10
If you have an older version of the .NET Framework installed on your Windows 10 computer, such as .NET Framework 4 or .NET Framework 4.5, you can use the offline installer to upgrade to the .NET Framework 4.5.1. Follow these steps:
Run the offline installer file (NDP451-KB2858728-x86-x64-AllOS-ENU.exe) that you downloaded from the official Microsoft website.
Accept the license terms and click Install.
Wait for the installation to complete. You may see a progress bar and some messages on the screen.
Restart your computer if prompted.
If you do not have any version of the .NET Framework installed on your Windows 10 computer, you can use the offline installer to install the .NET Framework 4.5.1. However, you will also need to install the .NET Framework 4.5 first, as it is a prerequisite for the .NET Framework 4.5.1. Follow these steps:
Go to the .
Select your preferred language from the drop-down menu and click Download.
Save the file (dotnetfx45_full_x86_x64.exe) to your computer.
Run the file and follow the instructions on the screen to complete the installation of the .NET Framework 4.5.
Restart your computer if prompted.
Run the offline installer file (NDP451-KB2858728-x86-x64-AllOS-ENU.exe) that you downloaded from the official Microsoft website.
Accept the license terms and click Install.
Wait for the installation to complete. You may see a progress bar and some messages on the screen.
Restart your computer if prompted.
How to verify the installation of .NET Framework 4.5.1
After installing the .NET Framework 4.5.1 on your Windows 10 computer, you may want to verify that the installation was successful and that the .NET Framework 4.5.1 is working properly. There are two ways to do this: using the Registry Editor or using the Command Prompt.
How to verify the installation of .NET Framework 4.5.1 using the Registry Editor
To verify the installation of .NET Framework 4.5.1 using the Registry Editor, follow these steps:
Press Windows + R keys to open the Run dialog box.
Type regedit and click OK to open the Registry Editor.
Navigate to the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full
Look for a DWORD value named Release in the right pane. If it exists, check its value data. If the value data is 378675, it means that the .NET Framework 4.5.1 is installed on your computer. If the value data is different or if the Release value does not exist, it means that the .NET Framework 4.5.1 is not installed or not working properly on your computer.
Close the Registry Editor.
How to verify the installation of .NET Framework 4.5.1 using the Command Prompt
To verify the installation of .NET Framework 4.5.1 using the Command Prompt, follow these steps:
Press Windows + X keys and select Command Prompt (Admin) from the menu to open the Command Prompt as an administrator.
Type the following command and press Enter: wmic /namespace:\\root\cimv2 path win32_product where "name like '%%.NET%%'" get version
Look for a line that shows 4.5.50938 as the version number. If it exists, it means that the .NET Framework 4.5.1 is installed on your computer. If it does not exist or if it shows a different version number, it means that the .NET Framework 4.5.1 is not installed or not working properly on your computer.
Close the Command Prompt.
How to troubleshoot common issues with .NET Framework 4.5.1 installation
Sometimes, you may encounter some issues or errors when installing or using the .NET Framework 4.5.1 on your Windows 10 computer. These issues or errors may prevent you from installing or running some applications or programs that require the .NET Framework 4.5.1.
How to fix error messages and codes
Some of the common error messages and codes that you may see when installing or using the .NET Framework 4.5.1 are:
The .NET Framework 4.5 is not supported on this operating system.
The .NET Framework 4.5 (or later) has not been installed because: HRESULT 0xc8000222
The installation of Microsoft .NET Framework 4 did not succeed because Fatal error during installation (0x80070643)
The update corresponding to KB2919355 needs to be installed before you can install this product on Windows 8.1 or Windows Server 2012 R2
The update corresponding to KB2833940 needs to be installed before you can install this product on Windows Vista SP2 or Windows Server 2008 SP2
To fix these error messages and codes, you can try one or more of the following solutions:
Make sure that your operating system is compatible with the .NET Framework 4.5.1 and that you have installed all the latest updates from Windows Update.
Make sure that you have enough disk space and memory available on your computer.
Make sure that you have a stable and reliable Internet connection if you are using the web installer.
Make sure that you have disabled any antivirus, firewall, or proxy software that may interfere with the installation process.
Make sure that you have closed any other applications or programs that may use or conflict with the .NET Framework 4 .5.1.
Make sure that you have downloaded the correct installer file for your system architecture (x86 or x64) and language.
Make sure that you have run the installer file as an administrator.
Make sure that you have followed the correct steps to install the .NET Framework 4.5.1 depending on whether you have an older version of the .NET Framework installed or not.
Make sure that you have verified the installation of the .NET Framework 4.5.1 using the Registry Editor or the Command Prompt.
How to uninstall and reinstall .NET Framework 4.5.1
If none of the above solutions work, you may need to uninstall and reinstall the .NET Framework 4.5.1 on your Windows 10 computer. This may fix any corrupted or missing files or components that may cause the installation or usage issues. To uninstall and reinstall the .NET Framework 4.5.1, follow these steps:
Press Windows + R keys to open the Run dialog box.
Type appwiz.cpl and click OK to open the Programs and Features window.
Find and select Microsoft .NET Framework 4.5.1 from the list of installed programs and click Uninstall/Change.
Follow the instructions on the screen to complete the uninstallation process.
Restart your computer if prompted.
Download and install the .NET Framework 4.5.1 web installer or offline installer from the official Microsoft website following the steps mentioned above.
Restart your computer if prompted.
How to contact Microsoft support for further assistance
If you still have issues or errors with the .NET Framework 4.5.1 installation or usage on your Windows 10 computer, you may need to contact Microsoft support for further assistance. You can do this by visiting the to collect information about your system and send it to Microsoft for analysis and troubleshooting.
Conclusion
In this article, we have shown you how to download and install the .NET Framework 4.5.1 for Windows 10, as well as how to verify the installation and troubleshoot common issues. The .NET Framework 4.5.1 is a software platform that provides a set of libraries and tools for developing and running applications that use .NET technologies, such as C#, VB.NET, ASP.NET, WPF, WCF, WF, and more. Some applications or programs may require this version of the .NET Framework to run properly on Windows 10, so it is important to have it installed and working correctly on your computer.
We hope that this article has been helpful and informative for you. If you have any questions or feedback, please feel free to leave a comment below.
Frequently Asked Questions
Here are some of the frequently asked questions about the .NET Framework 4.5.1 for Windows 10:
Q: Is .NET Framework 4.5.1 compatible with Windows 10?
A: Yes, .NET Framework 4.5.1 is compatible with Windows 10 on x86, x64, and ARM platforms.
Q: Is .NET Framework 4.5.1 still supported by Microsoft?
A: No, .NET Framework 4.5.1 is no longer supported by Microsoft since January 2016. However, some applications or programs may still require this version of the .NET Framework to run properly on Windows 10.
Q: What is the difference between web installer and offline installer?
A: The web installer is a small file that downloads and installs the required components of the .NET Framework 4 .5.1 from the Internet. The web installer is recommended for most users as it saves disk space and bandwidth. However, the web installer requires an Internet connection during the installation process and it may not work if you have a proxy or firewall that blocks the connection.
The offline installer is a large file that contains all the components of the .NET Framework 4.5.1 and can be installed without an Internet connection. The offline installer is useful for users who want to install the .NET Framework 4.5.1 on multiple computers or who have a slow or unreliable Internet connection. However, the offline installer takes more disk space and bandwidth to download and install.
Q: How can I update to the latest version of the .NET Framework?
A: The latest version of the .NET Framework is .NET Framework 4.8, which was released in April 2019. You can download and install the .NET Framework 4.8 from the . However, before you update to the latest version of the .NET Framework, you should check if your applications or programs are compatible with it, as some of them may require an older version of the .NET Framework to run properly.
Q: How can I uninstall the .NET Framework 4.5.1 from my Windows 10 computer?
A: To uninstall the .NET Framework 4.5.1 from your Windows 10 computer, you can follow the steps mentioned above in the section "How to uninstall and reinstall .NET Framework 4.5.1". Alternatively, you can use the to automatically detect and fix any issues with your .NET Framework installation, including uninstalling and reinstalling it.
Q: Where can I find more information about the .NET Framework 4.5.1?
A: You can find more information about the .NET Framework 4.5.1 on the following websites:
: This website provides the download link and documentation for developers who want to build applications that target the .NET Framework 4.5.1.
: This website provides the release notes and known issues for the .NET Framework 4.5.1.
: This website provides the latest news and updates about the .NET Framework and other related technologies.
: This website provides the official documentation and tutorials for the .NET Framework and other related technologies.
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