STSmr.exe is part of power eraser, so for some reason Power Eraser is crashing.
I'd suspect you have malware or a rootkit that is blocking killing Power Eraser or perhaps some other AV product?
Suggest you try running Power Eraser on another machine to verify the download is OK and also try a rootkit scanner such as GMER (gmer dot net) that may pick up something the other AV product missed.