: You will need a Qt Account to log into the installer.
This is the most critical step to ensure "Download Qt MSVC" success. Adding MSVC 2017 to Qt - c++ - Stack Overflow
: During installation, you must select the "Desktop development with C++" workload. This installs the necessary MSVC compilers (like MSVC 2019 or 2022) and the Windows SDK required by Qt. Step 2: Download the Qt Online Installer