# Installing a Windows compatibility tool

Windows applications can be run on Linux with **PortProton**, installed from the **Flathub** repository using the **Flatpak** package manager.

## Installing Flatpak

On Ubuntu 18.10 or later, run:

=== "Bash"
    ```bash
    sudo apt update && sudo apt upgrade -y
    sudo apt install flatpak
    ```

## Installing the GNOME Software plugin

To add Flatpak support to GNOME Software:

=== "Bash"
    ```bash
    sudo apt install gnome-software-plugin-flatpak
    ```

## Adding the Flathub repository

=== "Bash"
    ```bash
    flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
    ```

!!! warning "Restart required"
    Restart the system after adding the repository so that the changes take effect.

## Installing PortProton

PortProton can be installed either from the terminal or through GNOME Software.

**From the terminal:**

=== "Bash"
    ```bash
    flatpak install flathub ru.linux_gaming.PortProton
    ```

Start it with:

=== "Bash"
    ```bash
    flatpak run ru.linux_gaming.PortProton
    ```

**From GNOME Software:**

After Flathub has been added, PortProton is also available in GNOME Software.

![Installing Flatpak](../../assets/sun_install/linux/emulator/step-01.png)

## Initial setup

On first launch, PortProton automatically installs the required Wine dependencies and helper components. This process takes several minutes.

![Adding the Flathub repository](../../assets/sun_install/linux/emulator/step-02.png)

After initialization, the application's main functions become available, including:

- **Wine settings** — manage the Wine environment;
- **Windows command prompt** — run `cmd.exe` inside Wine;
- **File manager** — access the virtual Windows file system.

![PortProton interface](../../assets/sun_install/linux/emulator/step-03.png)

!!! tip "Next step"
    After installing PortProton, proceed to [Installing SunriseWorkbench](workbench.md).