I am using LR 4.1 with windows 7 on a Sony computer. My files are on a remote drive. I can see and modify (develop) my photos. I can import photos from a different drive. However I cannot rename or relocate my files. I get an error message that states "the folder cannot be renamed or moved". I had no problems on LR-3. I have been told by a Lightroom instructor that it is not a Lightroom issue. I have taken the computer back to the Sony dealer and they of course said it is not a Sony problem. Any help/suggestions would be appreciated.