When transferring from a compact flash card I insert into the card reader , then box pops up with otions - I go to view files, then I normally highlight the JPEG files and hit ALT to bring up the tool bar with FILE, EDIT etc. Then I use the "move File" or "copy file".
I have also just run a diagnostic and maintainance fix on the computer. It appears that I can copy bulk files without the problem occurring now - but the files that already have the problem are any better.
The other thing is that the p[roblem started around the time I loaded Skype onto the system - coincience?
BTW - thanks for the help.