Hi JPP,
Welcome to the HP Forums!
I would like to take a moment and thank you for using the forum, it is a great place to find answers.
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Just to let you know, this is an English forum. I used Google translate to read your post. I gathered that the computer starts up but then shuts down.When you turn it on you get a message to to go the HP tech center startup.
Here is a link to a Start-up / Boot-up document to assist you.
You could try doing a Windows restore back to a known good date.
If this has not helped please let me know what operating system you are running.