This is a Windows error message that may display on a peer-to-peer network.
SOLUTION: Run the SETATTR.BAT batch file, which is located in the \TLWIN directory. This batch file sets certain Time Line files as READ ONLY, which permits it to run on the peer-to-peer LAN.
If for some reason you need to erase the Time Line LAN files after you've run SETATTR.BAT, you will need to make them READ/WRITE. Use the File Manager Properties command to do this.