Hello @正裕 伊原 and welcome to the Community 🙂 ,
Thanks to develop your posts in English so it helps us, and the users of our community understand your question and try to help you.
I've translated your question using a translation tool to increase the chances of getting you a reply from our experts and community members, since the majority interact in English.
Here is the translation of your post using Google translate:
I installed the dfu demo, but I get alarm messages about missing drivers.
Please let me know where the driver is.
Could you please precise the STM32 product you are using?
Which messages did you find?
Are you using an DFU ST example?
Thank you.
Kaouthar
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