My tutorials are mainly adapted to Linux users (I'm using Ubuntu). It is possible to make everything work under Windows using WSL, however, USB under Windows is tricky !
Some precompiled binaries and instructions (including about how to make USB work) are available here.
@gojimmypi reported a success and explains how to do that here. Synthetizing the core, compiling RISC-V code and flashing the device work.
Under Windows, talking to the device through a terminal emulator doesn't always work. The solution may be here.