Hm I don’t see anything too sketchy in there.
If in doubt, make sure that the only installed VSCode extension are PlatformIO (v.2.2.1) and C/C++ by Microsoft (v1.1.3). You may also try to temporarily disable your antivirus software.
A full PlatformIO re-install can be done by first removing the VSCode extension, closing VSCode, then removing the folder C:\Users\<user>\.platformio, and installing the VSCode extension again.
If none of that helps, please file an issue in Issues · platformio/platformio-vscode-ide · GitHub to get help and link to this thread.