This may simply mean that you’re trying to connect at a busy time, when bandwidth may be restricted for all users.
Packet loss means that some of the data being sent out by your PC is getting lost on the way to your relevant League of Legends server. Make sure to shut these down before you start a match! These can include streaming apps, such as Spotify, websites such as YouTube and Twitch, torrenting programs, active downloads, and Skype. As League of Legends can take up a lot of your bandwidth, it’s not advised that you use other data-intensive apps alongside it. …you’ll usually be able to take action to fix it. If you’re suffering from packet buffering… Using the analysis provided by Netalyzr, you’ll be able to diagnose these two issues, and take steps to tackle them. Riot Games recommends checking out the Netalyzr tool, which was produced by the University of California Berkeley. Nevertheless, it’s worth diagnosing and tackling packet loss and packet buffering to ensure you get the most out of League. These two issues are more likely to affect the quality of your LoL playing experience, rather than resulting in your League of Legends launcher not opening. Note down your existing settings in case you need to revert.Click on your active connection, then click Advanced.Type “ipconfig /flushdns” and press enter.Then, right click on Command Prompt and click Run As Administrator. In the “Alternate DNS server” box, input: 8.8.4.4.In the “Preferred DNS server” box, input: 8.8.8.8.Make sure to note down your current addresses in case you need to revert! Check the “Use the following DNS server addresses” box.Select Internet Protocol Version 4 (TCP/IPv4) and click on Properties.Right click on the network adapter in use, and click on Properties.
If this is an issue for you, then here’s how to fix it and get playing LoL once again. However, in certain circumstances, they may use suboptimal settings, which can result in your LoL launcher not opening, as well as lagging and patching issues. Most players will use their ISP’s DNS settings to connect to the internet.
In rare cases, however, your Mac firewall might cause connection issues.
Make sure to hit the Update button to keep things running smoothly! However, if you’re using outdated definitions, they might not recognise your LoL client. As stated, using a firewall shouldn’t mean that League of Legends won’t launch.
Some, however, might be taking a little bit longer to get the message, or simply have strict or improperly configured settings.
Given the huge popularity of League of Legends (with 27 million players online on any given day!), most firewall manufacturers are now up to speed with the game, and will recognise LoL as a trusted program. Check out the relevant regional links below: Nonetheless, as an officially endorsed tool, it might provide a few answers for those of you wondering why your League client won’t open. It’s worth noting that this tool isn’t universally available, and (at the time of writing) is still only a beta tool, meaning that total accuracy and freedom from bugs can’t be guaranteed. To help, they’ve put together a tool called Lag Report, which should identify any connection issues affecting your PC, as well as that of your ISP in your local area. The team at Riot Games understand that when your League launcher won’t open, it can be seriously annoying. This might sound simple, but it’s always good to check out the more obvious options first! Lag Report If server issues aren’t behind your League of Legends client not opening, then the next step is to check your internet connection. If your location’s server is working fine, however, then the reason why League of Legends won’t open is likely to come from your end-either due to a problem with your internet connection or an issue from your PC.