How to Download and Install .NET Framework 3.5 on Windows 10 64-bit
If you are trying to run an application that requires .NET Framework 3.5 on your Windows 10 64-bit system, you may encounter a pop-up message that asks you to install this feature. However, you may not be able to install it through Windows Update or Control Panel, especially if you have a poor or limited internet connection. In this article, we will show you how to download and install .NET Framework 3.5 offline installer, as well as some troubleshooting tips for common installation errors.
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What is .NET Framework 3.5 and Why Do You Need It?
.NET Framework is a software development framework created by Microsoft that provides an environment for running applications. It consists of various components, such as libraries, languages, tools, and runtime engines. Different versions of .NET Framework have different features and functionalities, and some applications may target a specific version.
Features and Benefits of .NET Framework 3.5
.NET Framework 3.5 is a full cumulative update that contains many new features building incrementally upon .NET Framework 2.0, 3.0, and includes cumulative servicing updates to the dependent subcomponents. Some of the new features of .NET Framework 3.5 include:
LINQ: A set of extensions to the .NET languages that enable data querying capabilities.
Expression trees: A data structure that represents lambda expressions and queries in a tree-like format.
Improved ASP.NET support for AJAX development: A framework that enables creating rich web applications with minimal code.
HashSet collections: A collection class that represents a set of unique elements.
DateTimeOffset: A structure that represents a point in time with an offset from Coordinated Universal Time (UTC).
WCF and WF integration: A feature that enables seamless communication and workflow between Windows Communication Foundation (WCF) and Windows Workflow Foundation (WF) services.
ASP.NET Dynamic Data: A framework that enables rapid data-driven development without writing code.
Core improvements to the common language runtime: A component that provides core services such as memory management, thread management, security, and exception handling.
Performance improvements to Windows Presentation Foundation: A framework that provides a unified way of creating graphical user interfaces for Windows applications.
Ability of ClickOnce application publishers to opt out of signing and hashing: A feature that allows publishers to reduce the size and improve the performance of their ClickOnce applications.
Drawbacks and Limitations of .NET Framework 3.5
Despite its many advantages, .NET Framework 3.5 also has some drawbacks and limitations, such as:
Compatibility issues: Some applications may not be compatible with .NET Framework 3.5, especially if they are designed for newer versions of .NET Framework. You may need to install multiple versions of .NET Framework on your system to run different applications.
Security risks: .NET Framework 3.5 may contain some vulnerabilities that have been fixed in later versions of .NET Framework. You may need to apply security patches and updates regularly to keep your system safe.
Performance overhead: .NET Framework 3.5 may consume more system resources than newer versions of .NET Framework, such as memory, disk space, and CPU cycles. You may experience slower performance or reduced battery life on your device.
How to Download .NET Framework 3.5 Offline Installer
If you want to install .NET Framework 3.5 on your Windows 10 64-bit system without an internet connection, you can use the offline installer. The offline installer is a standalone file that contains all the components of .NET Framework 3.5 and does not require any additional downloads. Here are the steps to download the offline installer:
Step 1: Visit the Official Microsoft Download Center
Go to the .
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Step 2: Select Your Language and Click Download
On the download page, you will see a list of languages that are supported by .NET Framework 3.5. Choose the language that matches your system language or your preference, and then click the "Download" button.
Step 3: Save the File to Your Desired Location
You will be prompted to save the file to your computer. The file name is "dotnetfx35.exe" and the file size is about 231 MB. Choose a location where you want to save the file, such as your desktop or a USB drive, and then click "Save".
How to Install .NET Framework 3.5 on Windows 10 64-bit
Once you have downloaded the offline installer, you can install .NET Framework 3.5 on your Windows 10 64-bit system by following these steps:
Step 1: Run the Offline Installer as Administrator
Navigate to the location where you saved the offline installer file and double-click on it. You may see a User Account Control (UAC) dialog box asking for your permission to run the file. Click "Yes" to continue. Alternatively, you can right-click on the file and choose "Run as administrator" from the context menu.
Step 2: Follow the On-Screen Instructions to Complete the Installation
You will see a welcome screen that shows the license terms and conditions for using .NET Framework 3.5. Read them carefully and click "I have read and accept the license terms" if you agree with them. Then, click "Install" to start the installation process.
The installation may take several minutes depending on your system configuration and speed. You will see a progress bar that shows the status of the installation. Do not close or interrupt the installation window until it is finished.
Step 3: Restart Your Computer if Prompted
After the installation is completed, you may see a message that asks you to restart your computer to apply the changes. Click "Restart Now" to reboot your system, or click "Restart Later" if you want to restart it manually later.
How to Troubleshoot .NET Framework 3.5 Installation Errors
Sometimes, you may encounter some errors or problems when installing .NET Framework 3.5 on your Windows 10 64-bit system. These errors may be caused by various factors, such as corrupted files, incompatible settings, missing components, or network issues. Here are some methods that you can try to troubleshoot and fix these errors:
Method 1: Check Your Internet Connection
Even though you are using the offline installer, you still need a stable internet connection to verify some files and components during the installation process. If your internet connection is slow, unstable, or disconnected, you may encounter errors such as "0x800F0906", "0x800F081F", or "0x800F0907". To fix these errors, you need to check your internet connection and make sure it is working properly. You can try the following steps:
Restart your modem and router: Unplug the power cords of your modem and router for a few seconds, then plug them back in. Wait for them to reconnect to the internet and then try installing .NET Framework 3.5 again.
Use a wired connection instead of wireless: If you are using a wireless connection, such as Wi-Fi or mobile hotspot, you may experience signal interference or dropouts that can affect the installation process. Try using a wired connection, such as an Ethernet cable, to connect your computer to the internet and then try installing .NET Framework 3.5 again.
Disable your firewall and antivirus software temporarily: Some firewall and antivirus software may block or interfere with the installation process of .NET Framework 3.5. To avoid this, you can disable your firewall and antivirus software temporarily while installing .NET Framework 3.5. Remember to enable them again after the installation is completed.
Method 2: Configure the Group Policy Setting
If you are using a domain-joined computer or a computer that is managed by an administrator, you may need to configure the group policy setting that allows you to install .NET Framework 3.5 from an alternative source, such as the offline installer. To do this, you need to have administrative privileges on your computer and follow these steps:
Open the Group Policy Editor: Press Windows + R keys on your keyboard to open the Run dialog box. Type "gpedit.msc" and click "OK" to open the Group Policy Editor.
Navigate to the Computer Configuration section: On the left pane of the Group Policy Editor, expand the following folders: Computer Configuration > Administrative Templates > System.
Select the Specify settings for optional component installation and component repair policy: On the right pane of the Group Policy Editor, double-click on the policy named "Specify settings for optional component installation and component repair".
Enable the policy and specify the alternate source file path: On the policy settings window, select "Enabled" from the options. Then, under "Options", type or browse to the location where you saved the offline installer file (dotnetfx35.exe) in the "Alternate source file path" box. For example, if you saved the file on your desktop, you can type "C:\Users\YourUserName\Desktop\dotnetfx35.exe". Click "OK" to save the changes.
Close the Group Policy Editor and restart your computer: After configuring the policy, close the Group Policy Editor and restart your computer for the changes to take effect.
Method 3: Use the Windows Update Troubleshooter
Sometimes, .NET Framework 3.5 installation errors may be caused by some issues with Windows Update, such as corrupted files, missing components, or outdated drivers. To fix these issues, you can use the Windows Update Troubleshooter, which is a built-in tool that can scan and repair common problems with Windows Update. To use this tool, follow these steps:
Open the Settings app: Press Windows + I keys on your keyboard to open the Settings app.
Navigate to the Update & Security section: On the Settings app, click on "Update & Security".
Select Troubleshoot from the left pane: On the Update & Security section, select "Troubleshoot" from the left pane.
Select Windows Update from the right pane: On the Troubleshoot section, select "Windows Update" from the right pane.
Click on Run the troubleshooter: On the Windows Update section, click on "Run the troubleshooter" to start the tool.
Follow the on-screen instructions to complete the troubleshooting process: The tool will scan your system for any issues with Windows Update and try to fix them automatically. You may need to provide some information or perform some actions during the process. Follow the on-screen instructions to complete the troubleshooting process.
Method 4: Use the .NET Framework Repair Tool
If the Windows Update Troubleshooter does not resolve your .NET Framework 3.5 installation errors, you can try using the .NET Framework Repair Tool, which is a downloadable tool that can detect and repair some common issues with .NET Framework installations. To use this tool, follow these steps:
Download the .NET Framework Repair Tool: Go to the .
Run the tool as administrator: After downloading the tool, navigate to the location where you saved it and double-click on it. You may see a User Account Control (UAC) dialog box asking for your permission to run the file. Click "Yes" to continue. Alternatively, you can right-click on the file and choose "Run as administrator" from the context menu.
Accept the license terms and click Next: On the welcome screen of the tool, read the license terms and conditions and click "I agree" if you accept them. Then, click "Next" to proceed.
Select .NET Framework 3.5 from the list and click Next: On the product selection screen of the tool, select ".NET Framework 3.5" from the list of installed products and click "Next". The tool will scan your system for any issues with .NET Framework 3.5 installation.
Review the detected issues and click Next: On the detection results screen of the tool, review the detected issues and their recommended actions. You can also view more details about each issue by clicking on it. Then, click "Next" to apply the recommended actions.
Wait for the repair process to complete and click Finish: The tool will try to repair your .NET Framework 3.5 installation by applying the recommended actions. This may take several minutes depending on your system configuration and speed. Do not close or interrupt the tool until it is finished. After the repair process is completed, you will see a summary of the results. Click "Finish" to close the tool.
Method 5: Use the DISM Command
If none of the above methods work for you, you can try using the DISM command, which is a command-line tool that can scan and restore the health of your system image. The system image is a collection of files and settings that are required for Windows to run properly. Sometimes, the system image may get corrupted or damaged, which can affect the installation of .NET Framework 3.5. To use the DISM command, follow these steps:
Open the Command Prompt as administrator: Press Windows + X keys on your keyboard to open the Power User menu. Select "Command Prompt (Admin)" from the menu. You may see a User Account Control (UAC) dialog box asking for your permission to run the file. Click "Yes" to continue.
Type the DISM command and press Enter: On the Command Prompt window, type the following command and press Enter: DISM /Online /Cleanup-Image /RestoreHealth. This command will scan your system image for any corruption or damage and try to repair it.
Wait for the scan and repair process to complete: The DISM command may take several minutes or hours depending on your system configuration and speed. You will see a progress bar that shows the status of the scan and repair process. Do not close or interrupt the Command Prompt window until it is finished.
Close the Command Prompt and restart your computer: After the scan and repair process is completed, you will see a message that says "The operation completed successfully". Close the Command Prompt window and restart your computer for the changes to take effect.
Conclusion
In this article, we have shown you how to download and install .NET Framework 3.5 on Windows 10 64-bit using the offline installer, as well as some troubleshooting tips for common installation errors. We hope that this article has helped you to solve your problem and run your application smoothly. If you have any questions or feedback, please feel free to leave a comment below.
FAQs
Here are some frequently asked questions about .NET Framework 3.5 installation on Windows 10 64-bit:
Q: How do I check if .NET Framework 3.5 is installed on my system?
A: You can check if .NET Framework 3.5 is installed on your system by using the Registry Editor. To do this, follow these steps:
Open the Registry Editor: Press Windows + R keys on your keyboard to open the Run dialog box. Type "regedit" and click "OK" to open the Registry Editor.
Navigate to the .NET Framework registry key: On the Registry Editor, expand the following folders: HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > NET Framework Setup > NDP > v3.5.
Check the value of Install: On the right pane of the Registry Editor, look for a value named "Install". If this value exists and has a data of 1, it means that .NET Framework 3.5 is installed on your system. If this value does not exist or has a data of 0, it means that .NET Framework 3.5 is not installed on your system.
Close the Registry Editor: After checking the value of Install, close the Registry Editor.
Q: How do I uninstall .NET Framework 3.5 from my system?
A: You can uninstall .NET Framework 3.5 from your system by using the Control Panel. To do this, follow these steps:
Open the Control Panel: Press Windows + X keys on your keyboard to open the Power User menu. Select "Control Panel" from the menu.
Navigate to the Programs and Features section: On the Control Panel, click on "Uninstall a program" under the "Programs" category.
Select .NET Framework 3.5 from the list and click Uninstall: On the Programs and Features section, look for ".NET Framework 3.5" from the list of installed programs and click on it. Then, click on "Uninstall" from the toolbar above the list.
Follow the on-screen instructions to complete the uninstallation process: You will see a confirmation dialog box that asks you if you want to uninstall .NET Framework 3.5. Click "Yes" to continue. The uninstallation process may take several minutes depending on your system configuration and speed. Do not close or interrupt the uninstallation window until it is finished.
Restart your computer if prompted: After the uninstallation process is completed, you may see a message that asks you to restart your computer to apply the changes. Click "Restart Now" to reboot your system, or click "Restart Later" if you want to restart it manually later.
Q: How do I update .NET Framework 3.5 to a newer version?
A: You can update .NET Framework 3.5 to a newer version by using Windows Update or downloading and installing the newer version manually. To use Windows Update, follow these steps:
Open the Settings app: Press Windows + I keys on your keyboard to open the Settings app.
Navigate to the Update & Security section: On the Settings app, click on "Update & Security".
Select Windows Update from the left pane: On the Update & Security section, select "Windows Update" from the left pane.
Click on Check for updates: On the Windows Update section, click on "Check for updates" to scan for any available updates for your system.
Select .NET Framework from the list and click Install: If there is a newer version of .NET Framework available for your system, you will see it in the list of updates. Select ".NET Framework" from the list and click "Install" to start the installation process.
Wait for the installation process to complete and restart your computer if prompted: The installation process may take several minutes depending on your system configuration and speed. You will see a progress bar that shows the status of the installation. Do not close or interrupt the installation window until it is finished. After the installation process is completed, you may see a message that asks you to restart your computer to apply the changes. Click "Restart Now" to reboot your system, or click "Restart Later" if you want to restart it manually later.
To download and install the newer version of .NET Framework manually, follow these steps:
Visit the Official Microsoft Download Center: Go to the official Microsoft Download Center and download the latest version of .NET Framework that is compatible with your system. According to the search results, the latest version of .NET Framework is 4.8.1, which can be installed on Windows 11, Windows 10, and corresponding server platforms starting with Windows Server 2022. However, there is also a version 6.0.15 available for download, which is a preview version that may contain bugs or errors. To download the latest version of .NET Framework, follow these steps:
Visit the Official Microsoft Download Center: Go to the .
Select the version that you want to download: On the download page, you will see a list of versions of .NET Framework that are available for download. Choose the version that matches your system requirements and preferences. For example, if you want to download .NET Framework 4.8.1, click on it.
Select your language and click Download: On the next page, you will see a list of languages that are supported by the selected version of .NET Framework. Choose the language that matches your system language or your preference, and then click the "Download" button.
Save the file to your desired location: You will be prompted to save the file to your computer. The file name is "dotnet-framework-.exe" and the file size varies depending on the version. Choose a location where you want to save the file, such as your desktop or a USB drive, and then click "Save".
To install the newer version of .NET Framework manually, follow the same steps as described in the previous section for installing .NET Framework 3.5 using the offline installer.
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