https://devzone.nordicsemi.com/f/nordic-q-a/72314/bootloader-and-settings-showing-up-as-applicationHi, I am trying to set up a bootloader using the example code given in SDK 15.3.0. I am working with the nrf52840 dk and have been using the same device with the same project using the SDK15.2.0 and it has been working fine. However, I have not beenen-USTelligent Community 13Fri, 05 Mar 2021 10:14:25 GMThttps://devzone.nordicsemi.com/thread/297996?ContentTypeID=1Fri, 05 Mar 2021 10:14:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6976d8a0-5056-4798-8b68-1638d64e42f1Einar Thorsrud<p>Regarding the COM port, could it be that an other application is using it, so that it is allready open?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/297926?ContentTypeID=1Thu, 04 Mar 2021 22:53:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:92907201-a1d0-4d51-a7b8-6b35ee361f50amarin<p>I am currently using my windows computer and I am running as an administrator. That is good to know about nRF Connect Programmer!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/297830?ContentTypeID=1Thu, 04 Mar 2021 13:47:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8eb5032e-8e08-4ee6-a0d1-f526c2b17a82Einar Thorsrud<p>Hi,</p> <p>I see you get access denied on the COM port. Which OS do you use, and do you get this if running as administrator?</p> <p>Regarding the nRF Connect Programmer visualization it is basically just guessing on the content of the flash, as it has no real knowledge about the firmware. So you should not put any emphasis on the fact that more regions are marked as application in nRF Connect Programmer.</p><div style="clear:both;"></div>