I have a laptop and a desktop. When recently programmed using a desktop program desktop always write fails, or tips
Error (209040): Can not access JTAG chain, or to prompt another error, two weeks repeated attempts, one can not succeed. But if it can be programmed with a notebook.
Neighborhoods friend, according to his request to download a programer from the official website reinstall, so the problem has been resolved.
Conclusion: The suspect is driving a problem.