I have windows XP.
I just recently changed motherboard and hard drives, and now when copying jpgs from folder to folder, or drive to drive, I wind up with several truncated jpegs that I can no longer use.
It does it on either of my hard drives.
I have never had this problem until I made the changes above.
Example of problem:
A folder containing 50 jpg images is copied to another folder. Image 20 and 37 are corrupted.
The original folder is copied to another folder, but this time image 4 and 30 are corrupted.