Clarify that Expand-Archive requires PowerShell on Windows install guide

[zoozooll]

Page URL

https://docs.flutter.dev/install/manual

Page source

https://github.com/flutter/website/blob/main/sites/docs/src/content/install/manual.md

Describe the problem

In the Windows installation guide under the extraction step, the documentation provides the following command:

PowerShell
Expand-Archive -Path <sdk_zip_path> -DestinationPath <destination_directory_path>
However, the page does not specify that this is a PowerShell cmdlet. Users running standard Command Prompt (cmd.exe) receive an error stating that 'Expand-Archive' is not recognized as an internal or external command.

Expected fix

To improve the onboarding experience for Windows users:

Explicitly label the terminal prompt as PowerShell (e.g., using a PS > prompt indicator or a note stating Run this in PowerShell).

(Optional) Add a Command Prompt alternative using tar, which is natively available on modern Windows versions:

DOS
tar -xf <sdk_zip_path> -C <destination_directory_path>

Additional context

No response

I would like to fix this problem.

• I will try and fix this problem on docs.flutter.dev.