New Lenovo PC that crashes right at startup

Iv76 -  
fabul Posted messages 42295 Registration date   Status Moderator Last intervention   -

Hello,
I just bought a Lenovo IdeaPad 1 15ALC7 (AMD Ryzen 5 8 GB RAM 512 GB SSD) laptop with Windows 11 and I can't use it because of a pesky problem: it crashes shortly after startup.
The screen freezes at a random moment: I managed to reach the user name selection but never further. It doesn't have to be when I perform an action; sometimes I wait a bit and then I see I can't do anything. It often ends with a blue screen. I couldn't perform updates or troubleshooting because it crashes too quickly.
This PC is brand new, so it's probably not wear and tear.
Does anyone have an idea?
Thanks

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