League of Legends is light enough to run on the most ancient gaming machines today. This allowed the game to reach millions of PCs and also meant that it would have its fair share of errors. \n \nRiot updates League’s client constantly, which doesn’t ease the blow on players in terms of the number of errors they get. Though every new patch fixes some known bugs, they also introduce new ones. Troubleshooting for each of them may look like a dreadful task but almost all of the new errors resemble the old ones that aren’t a surprise for a decade-old game. \n \nWhile it may sound simple, we recommend restarting your PC and all running processes of League before trying out any of the solutions below since most issues tend to fix themselves. \n \nHere are some of the most common errors in League that prevent players from hopping into the game and how to fix them. \n \n \n \n \nError Name \nSymptoms \nSolution \n \n \nLeague of Legends Error Code 004 \nThe error usually occurs when the client fails to patch the game. Upon clicking on “OK” it causes the client to shut down and requires a restart. \nFailing to download or install an update either means there was a connection problem or there wasn’t enough disk space. Make sure that your connection is solid and you have enough space on your SSD or hard drive. \n \n \nError 7 \nThis error is a well-known indicator of Riot Games’ servers being overload and causes players to disconnect or use the basic features of League. \nSince this one’s a server related problem, your best bet is to keep trying to log in. Keeping an eye on League‘s Twitter account is also beneficial to know the current status of the servers. \n \n \nLeague of Legends Error 1B \nThe 1B error is usually related to ISP problems that mess players’ connection to the League servers. It prevents players from logging into the game. \nThough the issue is known for fixing itself in a couple of hours, you can try running the League client on administrative mode. If it doesn’t work, we recommend repairing your client. \n \n \nUnder maintenance error \nThis error mostly affects Linux users and prevents the League client from receiving updates. \nRepairing the client has the highest chances of success to fix this problem. If that doesn’t do the trick we recommend deleting RiotClientServices.old and ucrtbase.dll before giving it another go. \n \n \nUnexpected Error With Login Session \nThe login session error tends to arise when another instance of a League client gets stuck running in the background. \nTo fix the error, launch the task manager and end all the tasks related to League. Open up the client after that. If it doesn’t fix the error, we recommend initiating a client repair. \n \n \nError: 0xc0000005 \nThough the reason behind the error is unknown, it prevents players from logging into the game by blocking their access to the client. \nThe error is more of a Windows issue. Simple troubleshooting steps seem to give results, however. Try running the League client in administrator mode. If it doesn’t fix the problems, reinstall League after deleting all the files related to the game. \n \n \nA critical error has occurred \nThe critical error is caused by other programs which feature overlay options while playing games, it prevents players from logging into League. \nClose all programs that have an overlay-like feature like Steam, Origin, or Discord. Then locate your local League folder to delete config and data folders. \n \n \nUnexpected Login Error \nThis error usually shows up with a shaky connection and prevents players from downloading updates or log into the game. \nWe recommend performing a router reset and also changing your DNS. If these don’t work try contacting your ISP and let them know about your problem. \n \n \nUnknown direct x error \nThis direct x error appears during graphical instabilities and prevents players from launching the League client. \nThough the error message prompts players to update their graphics drivers, deleting the game.cfg file should also fix the problem. \n \n \nLeague of Legends Error Code 002 \nMuch like the error code 004, this error also disrupts the patching process and makes it impossible to log into the game. \nThis is also another storage-related error. Make sure that you have enough space on your data drivers. If that doesn’t seem to be a problem, try turning off your antivirus since it may be detecting a false-positive within the update files. \n \n \nThe program can’t start because d3dx9_43.dll is missing from your computer. \nThis error mostly occurs in new PCs and prevents players from starting a match. \nCompleting all the available Windows updates before launching League usually gets it done since the updates include the missing file. If this doesn’t work, we recommend manually installing the file via the DirectX End-User Runtime Web Installer. \n \n \n \n \nThough the client repair tool may get the job done to fix your client, the Hextech Repair Tool may come in handy if you encounter errors and bugs frequently. \n \nHextech Repair tool can: \n \n \tPerform easy reinstallations or repatches \n \tDo firewall management \n \tDisplays known issues in your region \n \tKeep logs of your crashes \n \nThese logs can be used by the League support team to pinpoint the source of your errors.