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:
Check out the News & Announcements to learn more.
Did you know that you can visit the Power Query Forum in Power BI and now Power Apps
Power Platform release plan for the 2021 release wave 2 describes all new features releasing from October 2021 through March 2022.
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