Pico W Setup
When installing the Pico "W" (Wireless), you will need to download a different version of the MicroPython runtime.
The list of runtime images is on the https://micropython.org/download/RPI_PICO_W page.
In this example, we are using v1.24.1 (2024-11-29) .uf2.
Here is the image from Thonny that shows what version you are using. Note that you MUST select BOTSEL button before Thonny will download the new MicroPython runtime.