Error: Something already exists at the destination. Please unbox in an empty fol der. Stopping to prevent overwriting data. at C:\Users\lenovo\AppData\Roaming\npm\node_modules\truffle\build\webpack:\~ \truffle-box\lib\utils\unbox.js:22:1
truffle init the folder should be completely empty.
Remember that could be some hidden files, you can check them from the console with the command
If so, you need or to delete them or you can easily start creating a new folder from scratch.