Roblox might not be installing due to various reasons. Corrupted temporary files can prevent the game from installing properly. Your firewall might be blocking Roblox, causing the installation to fail. If Roblox or other programs are running during installation, it can lead to problems.
Another common issue is installer corruption, where the installation file itself is damaged. Roblox also requires DirectX 11 or higher; without this, the installation won’t proceed. Problems with local app data, like incomplete folder structures, can also cause issues.
Your antivirus software or Windows Defender might block the installation, making it necessary to temporarily disable them. Sometimes, Roblox server issues might prevent installation, so checking the server status can be helpful.
To fix these issues, try running the installer as an administrator. Disabling antivirus software temporarily can also help. Deleting local app data and using alternative installation methods like RobloxPlayerLauncher.exe are other solutions.