Visual Studio 2019 não instala

Verifique esse tutorial e se te ajuda em algo : 

https://docs.microsoft.com/pt-br/visualstudio/install/create-an-offline-installation-of-visual-studio?view=vs-2019

Não consigo. Na verdade ele baixa os aquivos, porem depois não abre a próxima fase que seria de escolher o que sera instalado.

Olá

Verifique se tem todos estes requisitos que são necessários para instalara a versão 2019:

• Administrator rights are required to install Visual Studio.
• .NET Framework 4.5 is required to install Visual Studio. Visual Studio requires .NET Framework 4.7.2, which will be installed during setup.
• .NET Core has specific Windows prerequisites for Windows 8.1 and earlier.
• Windows 10 Enterprise LTSC edition, Windows 10 S and Windows 10 Team Edition are not supported for development. You may use Visual Studio 2019 to build apps that run on Windows 10 LTSC, Windows 10 S and Windows 10 Team Edition.
• Internet Explorer 11 or Edge is required for internet-related scenarios. Some features might not work unless these, or a later version, are installed.
• For Hyper-V emulator support, A supported 64-bit operating system is required. A processor that supports Client Hyper-V and Second Level Address Translation (SLAT) is also required.
• For Android Emulator support, a supported processor and operating system is required.
• Universal Windows app development, including designing, editing, and debugging, requires Windows 10. Windows Server 2019, Windows Server 2016, and Windows Server 2012 R2 may be used to build Universal Windows apps from the command line.
• The Server Core and Minimal Server Interface options are not supported when running Windows Server.
• Running Visual Studio 2019 (Professional, Community, and Enterprise) in Windows containers is not supported.
• Team Foundation Server 2019 Office Integration requires Office 2016, Office 2013, or Office 2010.
• Xamarin.Android requires a 64-bit edition of Windows and the 64-bit Java Development Kit (JDK).
• PowerShell 3.0 or higher is required on Windows 7 SP1 to install the Mobile Development with C++, JavaScript, or .NET workloads.

Lembro que a versão 2019 tem fraco desempenho no Windows 7, para usar a versão 2019 é aconselhado o Windows 10

Caso tenha todos esses requisitos sugiro que contacte o suporte do visual studio para um atendimento mais personalizado: Obtenha ajuda para o Visual Studio

O erro continua

Olá MarcoWindows

Desactive o seu antivírus e tente instalar de novo.