In case of Arduino IDE I have to enable "USB CDC On Boot: "Enabled"" or in PlatformIO I have to set : "build_flags = DDARDUINO_USB_CDC_ON_BOOT=1".
This is necessary to make ESP32C3 Serial.print.When the suspected files are not there I get an error and the compile fails.

I would like to keep the ...

Experimenting with a ESP32-C3 SuperMini board, my antivirus program ("SpyHunter") gave me several warnings.
After running a complete scan, I got a Trojan warning : "Trojan.MSIL.Crysan.BB (3 objects)".
The 3 exe files were located as this :

- ....\AppData\Local\Arduino15\packages\esp32\tools\esp ...

Thanks All again !
I have had no more issues ...

Roland

Strange !
I tried several times to put it in boot mode without success and suddenly it worked again ! !
I don't understand what happened ...
It is still not showing as COMx (now labeled as "USB JTAG/serial debug unit") but it works
Thank all for your support !
Roland

Strange things are going on here !
1- tried other cable -> same result
2-changed from desktop(win10) to laptop(win11) same cable -> appeared at COM5
3-back to desktop -> no COM
4-back to laptop -> COM5
5-tried to upload some code -> as soon as the connection tries to start, the COM5 disappears ...

I have a Lilygo T-Display S3 that worked correctly for a certain time. Now, when I connect the USB cable, it doesn't show up as a "COM PORT" but as an external drive (with drive letter). See image. What can I do to regain control over the unit ? https://www.flickr.com/photos/rolembeek/52631513328/in ...