Commands for installing Unity 2021 without prompts, removing it again and detecting it from deployment tools. A command is shown only when it is certain: from the manifest or the installer technology’s documented default.
Related guide: Silent install switches: MSI, NSIS, Inno Setup · Uninstall a program with the registry or PowerShell
With winget
PowerShell
winget install --id Unity.Unity.2021 -e --silent --accept-package-agreements --accept-source-agreementswinget upgrade --id Unity.Unity.2021 -e --silentwinget uninstall --id Unity.Unity.2021 -e --silentBy installer
64-bit · EXE (NSIS) · All users
Silent install
UnitySetup64-2021.3.45f2.exe /SCustom folder
UnitySetup64-2021.3.45f2.exe /S /D=C:\Apps\unity-2021- Uninstall registry key
- HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Unity 2021.3.45f2
PowerShell: download, verify, install
Downloads the official file, checks its SHA256 and installs it silently.
install-unity-2021.ps1
$url = 'https://download.unity3d.com/download_unity/88f88f591b2e/Windows64EditorInstaller/UnitySetup64-2021.3.45f2.exe'
$sha256 = 'AC7B45ED97D59F173D70A993362C84909C8C4B63280BD4CC30F9A5989ABF2596'
$file = Join-Path $env:TEMP 'UnitySetup64-2021.3.45f2.exe'
Invoke-WebRequest -Uri $url -OutFile $file -UseBasicParsing
if ((Get-FileHash $file -Algorithm SHA256).Hash -ne $sha256) { throw 'SHA256 mismatch' }
Start-Process -FilePath $file -ArgumentList '/S' -Wait 
