1. Windows Task Manager (Ctrl+Alt+Del) > "Processes" tab > find line with description "Chromium" > Right-click > Open File Location > keep resultant window open
2. Right-click on each line with "Chromium" description > End task
3. Go to window in (1.), then drag the exe file into recycle bin
4. Drag all other files and folders (which were in same directory as the exe file) into recycle bin
5. Go up 1 directory, and drag the folders (which earlier contained the exe file and other files) into recycle bin
6. Go up 1 directory, and drag the folder (e.g. "Chromium", "GameBot", etc) into recycle bin
7. Empty recycle bin
Source https://www.youtube.com/watch?v=Ch5DWKXaAjA