This problem is very strange (to me anyway) and now it's beggining to irritate me. I had some files in a folder I'll call 'A'. I decided to create another folder inside A (which I'll call B) and move some of the files into it. As soon as I did that, I could not open any of the files. I have no idea why. It was a standard 'Create Folder' and cut and paste. I can't open, move, delete to recycle bin (though I can delete permanantly). It just keeps on saying "Access in denied. Make sure disk is not full or file is not in use". Just to check, I created another folder inside A and another inside B and put some more music vids into them. They all opened fine. But the files directly inside B will not open. Access is always denied. I am completely baffed. Any help will stop me laughing like a mad person.

try this: http://www.wown.com/j_helmig/wxppfsec.htm