How to Fix League of Legends Patching and Update Errors

A League of Legends patch can fail because Riot's service is unavailable, the Riot Client is stuck, the connection is filtered, files are corrupted, or the installation drive cannot complete the update. The old advice to change Internet Explorer's proxy setting is no longer a complete solution, and Vietnamese players now update League through Riot rather than the former Garena client.

Work through the checks below in order. Test the update after each section so you do not make unnecessary system changes.

1. Check Riot's service status

Open the Riot Games service-status page, select League of Legends and your region, and look for maintenance or a login/patching incident. If Riot reports an outage, wait for the service to recover; repairing or reinstalling the game will not fix a server-side problem.

2. Restart the Riot Client completely

1. Close League of Legends and the Riot Client.
2. Open Task Manager in Windows and end remaining League or Riot Client processes only if they do not close normally.
3. Restart the computer.
4. Open the Riot Client and let it remain on the update screen without launching a second copy.

A restart clears a locked updater process and also triggers any Vanguard re-authentication required after the client has remained open for an extended period.

3. Confirm the network is usable

• Open several unrelated websites to verify that the connection itself works.
• Pause large downloads, streaming, cloud backup, and other game updates.
• Use Ethernet when possible, or move closer to the Wi-Fi access point.
• Restart the router if multiple devices are having connection problems.
• Check that Windows date, time, and time zone are set automatically; an incorrect clock can break secure connections.

4. Disable VPN and unwanted proxy settings

Turn off any VPN, gaming tunnel, traffic filter, or manually configured proxy, then reopen the client. On Windows 11, go to Settings > Network & internet > Proxy. Leave Automatically detect settings enabled and disable a manual proxy unless your school, workplace, or network administrator requires it.

Do not copy an unknown proxy address or DNS command from a video. That can redirect traffic or create a second problem.

5. Check the drive and permissions

• Confirm that the League installation drive has several gigabytes of free space beyond the displayed patch size.
• Make sure the Riot Games folder was not moved, renamed, or placed on a disconnected external drive.
• Install pending Windows updates and restart when required.
• If the client cannot write to its own folder, close it and launch the Riot Client once with administrator permission. Do not permanently run every game component as administrator unless Riot Support directs you to.

6. Allow Riot through security software

Windows Firewall or third-party security software can block the updater. Add the installed Riot Client and League of Legends executables to the security product's allowed-app list. Do not permanently disable the firewall or antivirus.

If the patch works only while a security product is off, turn protection back on immediately and correct its application rule. Check the vendor's help page for the exact allow-list procedure.

7. Run the built-in repair

Riot's current patching guidance recommends the client's full repair when game files are damaged:

1. Open League of Legends.
2. Select the gear icon in the upper-right corner.
3. Choose Initiate Full Repair.
4. Wait for the scan and downloads to finish without closing the client.

On Riot Client versions that place repair in the launcher settings, open the profile menu, choose Settings, select League of Legends, and use Repair. The wording can change between client releases.

8. Treat VAN errors separately

An error code beginning with VAN points to Riot Vanguard rather than an ordinary patch download. Restart first, then search the exact code in Riot Support. Do not change BIOS security features, uninstall drivers, or edit the registry based on a generic patch guide.

9. Reinstall only after repair fails

If the client repeatedly fails at the same file after the network, storage, security, and repair checks pass, uninstall League of Legends through Windows Settings, restart, and download a fresh installer from the official League of Legends site. Keep Riot account credentials private and avoid third-party “pre-patched” archives.

10. Send logs to Riot Support

If the error continues, take a screenshot that includes the full message and code, note when the failure occurs and how much of the patch completes, and submit a ticket through Riot Games Support. Riot's Repair Tool can collect relevant logs; attach them only through the official support request.