Can you tell us what steps you followed when reinstalling?
Also, what did you do when you were reorganising your system – the changes you made to bork it the first time?
Have you attempted to open an existing project and compile it? It should download the required frameworks and tools when you first do so. Installing PlatformIO into VSCode doesn’t do that for you as it has no idea which board(s) you will be using.
Failing that, make sure you have followed all the installation instructions I documented when I installed PlatformIO and VSCode on a Windows 10 installation. Trying to install Platformio into VSCode, but it can't find Python, even though it is onboard! - #6 by normandunbar
Cheers,
Norm.