Hi zefiriu,
I'm Dyari. Thanks for reaching out. I will be happy to assist you in this regard.
If your computer has been upgraded to Windows 11 from Windows 10, you are able to downgrade it within 10 days without losing any data and installed app.
Otherwise, you should perform a clean install.
Since your computer came preinstalled with Windows 11, it is best to back up your data, then perform a clean install.
https://answers.microsoft.com/en-us/windows/for...
Please let me know if you need further assistance and keep me updated.