If you already have .NET 4.6, 4.7, or 4.8 installed, you do not need 4.5.2. These versions are "in-place" updates and are backwards compatible.
This usually means you accidentally used the web installer instead of the offline version. Re-download the full 66MB+ file.
The process usually takes 5–10 minutes depending on your hard drive speed. net framework 4.5 2 offline installer for windows 7
Sometimes .NET requires specific Windows components. Run Windows Update to ensure the underlying OS is patched. Final Note on Support
Visit the official Microsoft Download Center . Look for the file named NDP452-KB2901907-x86-x64-AllOS-ENU.exe . If you already have
While .NET 4.5.2 is robust, keep in mind that Microsoft ended technical support for this specific version in 2022 (except for certain OS integrations). For the best security on Windows 7, consider upgrading to if your hardware and software allow it.
Before you run the installer, ensure your system meets these two requirements to avoid "Installation did not succeed" errors: Re-download the full 66MB+ file
The standard "web installer" is a tiny file that downloads components during the installation process. If the connection drops, the install fails.