1. Open Add Roles and Features.
2. When the Add Roles and Features Wizard opens, click Next.
3. Select Role-based or feature-based installation and click Next.
4. Select your destination server and click Next.
5. On the Select server roles page, click Next.
6. On the Select features page, select .NET Framework > ASP.NET 4.7 and click Next.
7. Confirm your installation selections and click Install. Windows will install ASP.NET 4.7 in the background.