Windows 7 with Multiple Users

Avast Program Version: 2014.9.0.2018
Virus Definition 140423-1

I have admin account and I started a full avast scan. Later on to my great surprise files were deleted without my permission or input. I found out my wife logged in earlier, a standard user account, and she received a copy of the scan result prompt which have the power to make the decision to DELETE the files. I don’t even have the option to undo the action.

I am dumbfounded why another user able to access the program I am running, why they received a message that was meant for me, and why they were able to make a decision for me.

This problem would be even worse if it work on files that’s under Windows User folder.