The installer interface dates from 2012. Microsoft has not updated the visual design because the offline installer is considered a legacy tool.
To successfully deploy the .NET Framework 4.5 on a Windows 7 machine, the following prerequisites must be met: NET Framework system requirements - Microsoft Learn microsoft net framework 4.5 offline installer for windows 7
Avoid third-party “download sites” that wrap installers in adware. Only use official Microsoft sources. The installer interface dates from 2012
file and select "Run as administrator" to ensure proper permissions. Accept Terms : Check the box to accept the license terms and click : The installation typically takes between 5 and 15 minutes depending on your hardware. Only use official Microsoft sources
Perfect for "air-gapped" computers or machines with restricted internet access.
Microsoft offers several versions of the 4.5 family. While you asked for 4.5, it is highly recommended to install