Or, to suppress all UI but show errors:
The Microsoft .NET Framework 4.5 is a critical component for thousands of Windows applications—from small business accounting software to complex engineering tools. While modern versions like .NET 6, 7, and 8 exist, many legacy enterprise applications still explicitly require .NET Framework 4.5.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full download dotnetfx45-full-x86-x64.exe offline installer
No. .NET Framework versions from 2.0 to 4.x install side-by-side. Uninstalling older versions may break apps that depend on them.
Windows 7 SP1, Windows Vista SP2, Windows Server 2008 R2 SP1. Not Supported: Windows XP does not support .NET 4.5. Or, to suppress all UI but show errors: The Microsoft
: Recommended as the most stable and compatible version within the 4.5 family. You can download it from the Microsoft Download Center .NET Framework 4.5.1 (Offline Installer) : Available at this Microsoft Support Page .NET Framework 4.5 (Standard Installer) : The base 4.5 setup is found on the Official Microsoft Download Center Quick Setup Guide Verify Compatibility
As of April 2022, Microsoft has ended support for .NET Framework 4.5.2 and below because they use outdated SHA-1 security standards. If possible, consider downloading .NET Framework 4.8 , which is the current highly compatible version. Compatibility Check Before you run the file, make sure your OS is supported: Not Supported: Windows XP does not support
Run this command after downloading:
If you are using Windows 10 or Windows 11, you generally do not need to download .NET Framework 4.5 manually. These operating systems come with newer versions (like 4.7 or 4.8) pre-installed. Attempting to install an older version like 4.5 on Windows 10 is usually blocked by the system because it detects a newer version is already present.
This usually indicates a corrupted download. Re-download from Microsoft, ensuring the file size matches what Microsoft lists (approx. 59.8 MB for the English version).