Hello Molli Pintér,
I'm sorry you are running into this. The "no internet connection" toast in the Minecraft sign-in window is a bit misleading — your laptop's internet is clearly fine, so what is most likely failing is the launcher itself reaching Microsoft's authentication servers (login.live.com, account.microsoft.com, api.minecraftservices.com).
Before suggesting fixes, a few details would help narrow this down:
- Which Minecraft are you signing into — Bedrock Edition, Java Edition, or the unified Minecraft Launcher app from the Microsoft Store?
- A screenshot of the exact error window if possible.
- Are you on home Wi-Fi, or a school / work / public network?
- Any third-party antivirus, firewall, or VPN installed?
In the meantime, a few things commonly behind this symptom that are worth trying:
- If you have a third-party antivirus or VPN running, temporarily disable it and try the sign-in again.
- If you are on school or work Wi-Fi, try a phone hotspot instead.
- Check your system date and time are correct (Settings > Time & language > Date & time, with "Set time automatically" on).
- If the above does not help, reinstalling the Minecraft Launcher from the Microsoft Store.
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