I have had an Arduino Uno for a couple of weeks and had been working fine until I switched from the ide available on the Microsoft store to the version from your website which appear to be identical. Since I made the switch whenever I try to upload to the board it errors and gives me. avrdude: ser_open(): can't open device "\.\COM3": The system cannot find the file specified. And if i try to change the port the menu is greyed out.
I am using Ardiuno IDE version 1.8.5 (from the arduino website) running Windows 10 (64x)