A friend and I are working on a little project for a Nano. Basically, it's just a little speaker that plays Africa by Toto.
Previously, when we were working on the thing, I took the wrong cable with me (one for charging your phone). My friend thought that this could happen, so he took a cable with him.
Now I made a basic sketch, soldered some wires to a speaker and uploaded it using the Old Bootloader processor. It worked perfectly: everything uploaded fine and the speaker made some noises.
Now here's the thing: at home, I made the actual Africa by Toto-sketch. But it didn't upload. I got an error: avrdude: ser_open(): system couldn't find \.\COM3.
Now I know what you think: just go to Device Manager, select Ports, etc. But I didn't find the Ports category in Device Manager. Even not after showing the hidden categories.
Windows 10, 64-bit, Arduino IDE version 1.8.7, 8GB RAM but another 4 allocated from memory.
Thanks in advance,