Did you try and download it directly from the windows store?
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PowerApps works fine from Microsoft Store on my machines, but maybe the troubleshooting page can help you: https://support.microsoft.com/en-us/help/13765/microsoft-store-cant-find-or-install-app
He asked for "powerapps studio" not "powerapps"...
The Windows version of PowerApps Studio is no longer available (and hasn't been for several years, sadly). The Windows Store link is now just for the client / player.
PowerApps Studio now (as of 2021) only exists online:
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