If you don't have Visual Studio yet, download and install the Visual Studio Community version. Select the packages needed for .NET Framework ASP.NET Web Forms applications during the installation steps.
Then:
- Open up Visual Studio -> Create a new project and then select the "ASP.NET Web Application (.NET Framework)" template.
- Enter your project's name and folder.
- On the "Create a new ASP.NET Web Application" dialog, select "Web Forms", Authentication "None", and check Advanced "Configure for HTTPS" off.
- Click on the "Create" button.