Due to a magical feature of OneNote software, one day I noticed lots of files with extension ' .onetoc2 ' in one of the folder and each of it's subfolders. I found the below solution using wildcards with ' del' command and '/S ' switch to remove them completely and recursively - 1. Open command prompt and go to home directory where you want to perform this operation cd MyFiles 2. Run the below command – del /S *.onetoc2 PS: There's a huge difference between running del /S *. onetoc2 and del /S C:\*. onetoc2 . The first command is executed from the current location , whereas the second is executed on the whole drive .