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Hello there! I am Charity. I'm glad to help you today!
It sounds like you're having firmware issues. May I ask what is the exact model of your Dynabook?
Press Windows + R, type msinfo32, and hit Enter.
In the System Summary section, please provide me the three things below.
BaseBoard Manufacturer
BaseBoard Product
BaseBoard Version
Kind Regards,
Charity
Please note that things might need more than one reply to completely resolve your issue, as it will completely depend on the complexity of the question and the amount of detail that you have provided me.