As Ashley constantly states, reports such as these are no good if you don't provide both a .capx and as much info as possible regarding the process you were undertaking at the time.
Info such as save location, anti-virus used (some can delete temp files before you've finished with them, but could cause corruption), os, what you were doing at the time, and anything else you can think of that might help.
As has been stated, there does appear to be more than the odd one or two corrupted files of late, so every detail may be important in determining the reason.