I'd like to learn from the experience. Please, how does the forum work? I have Arduino uno win 64. 7 premium. Many things do not work.
The forum works by you posting a question in an appropriate section of the forum (in this case NOT the bootloader section), you provide as many details as you can, like code, schematic, observations and expectations, and hopefully, other forum members will read it and offer their thoughts and advice.
They may also ask more questions.
You should do your best to provide answers.
I reckon a good way to see how the Forum works is to read through several existing Threads. And don't restrict yourself to Threads relevant to your problem.
Many things do not work.
Like what ?