1. Click Download installer manually above (or the Play button if the download didn't start).
2. Open your browser's Downloads page (Ctrl+J in Chrome / Edge, Ctrl+Shift+J in Firefox).
3. Find Roblox2Installer.exe and double-click it.
4. If Windows SmartScreen warns you, click More info → Run anyway. The installer is unsigned but harmless.
5. Wait a couple of seconds. The game launches and a Roblox2 shortcut is added to your desktop.
6. To uninstall later: delete %APPDATA%\Roblox2 and the desktop shortcut.

Still stuck? Right-click the downloaded file, choose Properties, tick Unblock, then run it again.