Okay... why cant I delete it? Why is not NOT in the usual spot it should be as per the socialnet MS link? As you stated, no scanner is perfect and if its some unknown; which I still doubt, then maybe its a new method not being considered.
TO BE CLEAR... I dont really think its a virus (but I could be wrong).
Either way, its in a directory entitled Avast! Sandbox. Used all tools present to get rid of the directory and file... none worked. This should be addressed, not debated wther its a virus or not. Not to mention, if it was and was 'clever' enough; Im sure someone could be redirecting my upload or even the page Im trying to upload to.
Lets focus on the question "Is this an Avast file; or should I submit it to Avast from another PC?"
BTW... here is a notepad look at the file: