I recently plugged my h/disk into another laptop. Later when I plug into my own laptop, noticed a weird folder (folder name is numbers only) there. Tried to delete but a pop-up keep saying I don't have permission eventhough I've changed my Vista setting to enable delete. Scan the folder, no virus though.

Same problem with a mp4 file I transfered to my desktop. Refuse to let me delete it.

Anyone experience this before? How to delete this offending folder/file? It's taking up precious disk space.