To overcame issues during Installation of Sql Server, following are some prerequisites must followed:
If NET 3.5 isn't Installed, We face this error as shown, it won't allow to continue setup.
You'll get below warning when you forgot to disable firewall: 
Still, You can go ahead with the installation of SQL Server, but when it finishes configure your Windows Firewall to allow SQL Server access.
Rule “Microsoft .NET Framework 3.5 SP1“ required
SQL Server installation needs .NET 3.5 SP1 for proceeding.
Its one of requirements in Hardware and Software Requirements for Installing SQL Server.
Its one of requirements in Hardware and Software Requirements for Installing SQL Server.
If NET 3.5 isn't Installed, We face this error as shown, it won't allow to continue setup.
Rule “Disable Windows firewall"
You'll get below warning when you forgot to disable firewall:
Still, You can go ahead with the installation of SQL Server, but when it finishes configure your Windows Firewall to allow SQL Server access.
Below are Hardware and Software Requirements documentation for Installing different versions of SQL Server on Windows: