I am trying to uninstall avast 7 on windows 7 through the control panel. I click to uninstall and at that point avast takes me to the internet security setup screen. From there I select uninstall, then the process begins and gets hung up. There is no progress bar so it is had to determine how far along the progress is but it gets hung up where it says sand box. Has anybody experience this if so what should I do to correct this issue?