# Port keeps changing

**URL:** <https://forum.arduino.cc/t/port-keeps-changing/1111447>\
**Category:** MKR WiFi 1010\
**Created:** [April 5, 2023, 3:55pm UTC](https://forum.arduino.cc/t/port-keeps-changing/1111447 "2023-04-05T15:55:10Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![Ballscrewbob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ballscrewbob/32/950458_2.png) [@Ballscrewbob](https://forum.arduino.cc/u/Ballscrewbob)\
**Post date:** [April 5, 2023, 6:13pm UTC](https://forum.arduino.cc/t/port-keeps-changing/1111447/4 "2023-04-05T18:13:36Z")

</div>

Hmm it appears that something killed some of the specific "how to's"  
They were at the top of almost every section !

> [@Why are the MKR series USB ports so unreliable?](https://forum.arduino.cc/t/why-are-the-mkr-series-usb-ports-so-unreliable/622815/2):
>
> The MKR and a few other boards have DUAL COM ports. One is the regular one and the other is the BOOTLOADER. During programming it would be normal to see it swap those ports then swap back. Quickly double pressing the reset button will hold it in the BOOTLOADER mode which is useful in case your sketch is not quite perfect. Putting a general list below some of which may be useful now or in the near future. Note the USB and Antivirus one. Please take a few moments to Learn and Use The Forum [H…](https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/679966)

Hope that helps.

---

_[View the full topic](https://forum.arduino.cc/t/port-keeps-changing/1111447)._