Can't install League of Legends: admin rights or the network
InstallerWindowsRiot's name for this error
Can't install League of LegendsWhat it means
The installer couldn't get League onto your PC. Riot names two causes: your account lacks administrator rights, or something is getting in the way of your connection.
What to try first
Download a fresh installer from the League site, right-click it and choose Run as administrator.
Is it you or Riot? If lots of players are hitting this at once, it's probably the servers. Check League server status before you start reinstalling things.
No single error message
People searching for this type "something went wrong during installation" or "unable to install", whatever their screen said. Riot's install-failure article (updated May 31, 2026) doesn't quote any installer message, so Riot never ties a wording to a cause.
Its two causes and three fixes apply either way. Start at the top.
How to get it installed
Update Windows. Riot says an out-of-date Windows can stop the install. Search Start for Windows Update and click Check for updates, and install what it finds.
Run the installer as administrator. Grab the installer from the official League site first. Then right-click the file you downloaded and pick Run as administrator. If your account can't do that (a work or family PC, say), someone with an admin login on it will have to.
Switch off the firewall for the install. A third-party firewall gets disabled from its own settings. For the one built into Windows, go through Control Panel, System and Security, Windows Firewall, then Turn Windows Firewall on or off, and turn it off for each network location (you may need the admin password here). Put it back on once League is in.
Installed, but broken
If the install goes through and the trouble starts afterward, you're in different territory. A patch that stops halfway is Error 004. A client that says it found a problem with your installation wants to repair itself, and a repair that won't finish has its own checklist.
Other wordings of the same error
League of Legends something went wrong during installationLeague of Legends unable to installLeague installer not workingLoL install failed
Related errors
Source: Riot Games Player Support, Can't install League of Legends, updated May 31, 2026. Riot's steps are paraphrased here, not copied; checked September 29, 2026.