I had this problem in Windows XP. The file was downloaded off Morpheus into the Program Files folder and I was unable to delete, rename, cut & paste, etc. any files in that folder. But I did figure out a way to delete the file. Create a new folder, or move the file into a folder that you don't need, and then delete the folder. Now, I'm downloading my files onto the C drive instead of the Program Files folder. Also, check to see that the file is not set to read-only. Hope this helps.