Minecraft problems are the worst. All you want to do is chill out and break some blocks, but you're stuck troubleshooting instead.
Well, if your issues are all to do with LAN worlds in Minecraft, then maybe you'd be interested in some fixes.
We've got a load of different fixes here for you to try.
So, here's how to fix your LAN issues in Minecraft.
How to fix LAN worlds in Minecraft
The first thing to check is whether or not all of the computers are actually connected to the same network. It seems like a silly check, but it's probably the most common issue.
If that's not the case, then you should go into your Control Panel in Windows and then click the WIndows Defender Firewall, then click Allow an app or feature through Windows Defender Firewall, then click Change Settings, then check that javaw.exe, Java (TM) Platform SE binary, and Minecraft are all checked, then hit OK. Now your firewall will let Minecraft out.
If that's all golden, then it's worth making sure that your Network Discovery is on. Once again, go to your Control Panel, but this time select Network and Internet, then Network and Sharing Center. Select Change advanced sharing settings, select the Private section, and make sure Turn on network discovery is on, now do the same in the Public section.
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More fixes for LAN worlds in Minecraft
If the above fixes don't fix things, then good news, we've got even more options for you. Try turning off all of your mods. It's an odd thing to do, but sometimes they can cause LAN issues.
If that doesn't work, update your Network Drivers. Go to Device Manager, then click Network adapters, then right-click your Network Driver and choose Update Driver, then choose Search automatically for updated driver software.
If that one doesn't work, then your final fix is to simply uninstall Minecraft, then reinstall Minecraft. It's a classic fix, so hopefully, it works for you.
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