Not a newbie by far but I've never seen this happen before. Cloned the HDD to an SSD for a client as per usual. The client calls me later stating Thunderbird opened and asks to set up an account. I log in remotely and verify all the paths in profile.ini etc. Everything is as if was before the clone of course. I can see all the folder and file structures as they should be. Ok, I decided to mount the image of the disk and inspect the files. Looks perfect. Thought I would copy the profile and reload it into the disk as a test. That's when I got 3 errors that these files were corrupt. As follows. \Profiles\xxxxx.default\Mail\plus.pop.mail.yahoo.com\Inbox Error opening source file: The file or directory is corrupted and unreadable. Code: 1392 \Profiles\xxxxx.default\prefs.js Error opening source file: The file or directory is corrupted and unreadable. Code: 1392 \Profiles\xxxxx.default\sessionCheckpoints.json Error opening source file: The file or directory is corrupted and unreadable. Code: 1392 I've talked to multiple colleagues and we are all like whats going on here? I've been at this most of the day trying to replace those files with other 'Good' files from a new install etc...I'm stumped! Does anyone have any ideas? Edit: I was using Teracopy in a Windows PE environment and that code is specific to teracopy. Thank you!