Installing an unsigned executable on Windows can also pose security risks, as Windows has built-in mechanisms to protect users from potentially harmful software. Here's a general guide on how to do it:

### Steps to Install an Unsigned Executable on Windows

1. **Download the Executable**: Download the unsigned executable file you want to install from a trusted source.

2. **Locate the File**: Use File Explorer to locate the downloaded file, which is often in the `Downloads` folder unless you specified a different location.

3. **Attempt to Open the File**: Double-click the file to open it. Windows may show a warning that the file is not commonly downloaded and could harm your computer.

4. **Override Security Settings**:
   - **Option 1: Run Anyway**
     - When you see the warning, click on `More info` in the dialog box.
     - A new option will appear to `Run anyway`. Click this to proceed with the installation.

   - **Option 2: Disable Windows Defender SmartScreen (Temporarily)**
     - Open the Start menu and go to `Settings`.
     - Navigate to `Update & Security` > `Windows Security` > `App & browser control`.
     - Under `Check apps and files`, select `Off`. This will disable SmartScreen temporarily.
     - Try running the executable again.
     - Remember to turn SmartScreen back on after installation for continued protection.

5. **Use Command Prompt (Advanced Users)**: If the above methods don't work, you can use the Command Prompt to run the executable directly:
   - Open Command Prompt as an administrator.
   - Navigate to the directory where the file is located using the `cd` command.
   - Run the file by typing its name and pressing Enter.

### Important Considerations

- **Security Risks**: Running unsigned executables can expose your system to malware and other security risks. Only proceed if you trust the source of the software.
- **User Account Control (UAC)**: UAC might prompt you for permission to run the executable. Ensure you have administrative rights to proceed.
- **Antivirus Software**: Your antivirus software might also block unsigned executables. You may need to temporarily disable it or add an exception for the file.

If you're unsure about any of these steps or the safety of the file, it's best to consult with someone who has more experience with Windows or to contact the software developer for support.