Sometimes you may need to install an older version of NET Framework like .NET 4.0. In this post, MiniTool will focus on the .NET Framework 4.0 download/install for Windows. It also introduces some other important information about NET 4.0.
Although most of us have .NET 4.8 installed for Windows 10/11, certain apps and programs still require older NET Framework versions to run properly. Moreover, the older Windows versions also need an older NET Framework. For example, you may need to get NET Framework 4.0 downloaded/installed for Windows 7/XP/Vista.
Step 1. Click here to open the official .NET Framework download page and click on Download .NET Framework 4.0 Runtime (Web Installer). Also, you can scroll down to find advanced downloads like Offline Installer and click on Runtime.
I had a problem with my Windows 10 and I had to run a fresh installation just three days ago. I have downloaded only some essential software and one game, but in spite of that Malwarebytes repeatedly shows me a warning with the message: "Website blocked due to a malware" and pointing to the file C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe.
Please download the attached fixlist.txt file and save it to C:\Users\Usuario\Desktop\NOTE. It's important that both files, C:\Users\Usuario\Desktop\FRSTENGLISH.exe, and fixlist.txt are in the same location or the fix will not work.
Where the %WINDIR% is path to your Windows installation, what is typically C:\Windows or C:\WINNT. Note that you can keep %WINDIR% as this environment variable should be set on your system to point to the Windows folder. The Framework needs to be replaced by Framework64 to register the assembly for use from 64-bit applications.2 On 64-bit systems, you should generally register the assembly both for 32-bit (such as old versions of Microsoft Excel) and 64-bit applications. The is version of .NET framework to register the assembly with. It is recommended to use the latest available, what currently is v4.0.30319. You may however use any framework version from 2.0 (v2.0.50727) up. Note that framework 3.0 and 3.5 do not ship with RegAsm.exe. For these versions use RegAsm.exe from 2.0.
If you happen to remove the newest registered assembly, without unregistering it first, you will not be able to instantiate classes from the assembly, no matter that you have older versions of the assembly registered too. You need to download the version, you have removed, again and unregister it. Exact physical location of the assembly, when unregistering, does not need to match the original location of the removed assembly (as long as the versions match).
I have confirmed that during the delay, Microsoft .NET Framework NGEN v4.0.30319_X86 service is in Starting state. Disabling this service would temporarily resolve the issue for one single startup. (I believe it is because installed .NET Framework applications put this service back to work.)
I downloaded the last published Net-Framework update package KB4586876 and unzipped it with 7zip.And then i unpacked the Windows10.0-KB4586876-x64-NDP48.cab file with the command expand "Windows10.0-KB4586876-x64-NDP48.cab" -f: *. * Target path again.
Most .NET Framework NGEN v4.0.30319 errors are the result of a missing or corrupt version of the file installed by Windows 10 Operating System. Ordinarily, installing a new version of the 30319 file will repair the problem creating the error. In some cases, the Windows registry is attempting to load a .NET Framework NGEN v4.0.30319 file that no longer exists, therefore we recommend running a registry scan to repair any invalid file path references.
These types of errors will normally stop occuring if the correct .NET Framework NGEN v4.0.30319 file version is placed in the right location, but you should double-check that is the case. Test the outcome of your replaced file by opening Windows 10 Operating System and seeing if the error message is still being triggered.
Commonly, .NET Framework NGEN v4.0.30319 errors are seen during the Windows 10 Operating System-related hardware or software install process, while a Microsoft Corporation-related driver is loaded, or during Windows shutdown or startup. Recording when .NET Framework NGEN v4.0.30319 errors occur is paramount in finding the cause of the Windows 10 Operating System problems and reporting them to Microsoft Corporation for assistance.
So, the fix is simple: just copy the files from that package to C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5! Just download the package from NuGet, open it as a zip, and copy the files from build\.NETFramework\v4.5\.