Does anyone have anymore suggestions?
I would try copying an image from your wife's machine onto a usb and see if it opens ok on your machine. If so then copy it to the HD on your machine and see if it "stays good" for a few hours/days. If at a loss the best general technique is divide and conquer. Try tests that determine which side the problem is on be it hardware/software data/executable if software etc..
Process of elimination may take awhile but unless you have a good clue to the cause it may be the only way to go. :thumb: