When I open a JPEG file, edit it and resave, X7 blows up and destroys the original file. I'm working in Win 7 64bit, X7 version 1021 with latest updates applies. 16GB memory and I never had this issue before. I even went into Photoshop, edited and saved as jpeg w/ no issues (and PSD). I reinstalled everything about a month back so this should be pretty clean.
I'm going to disable Malwarebytes active monitoring; sometimes that screws up things. I can't disassemble the problem file in VS 2015, either; it's probably a C++ memory pointer issue.