Severe Installation Problem. Installation is stuck and it will not quit

Please help. I have a serious installation program.
Avast froze on a windows 10 machine (brand new) with the message “installation in progress, do not turn off your computer.”
I can not make it quit. It wont go away if I try to end task it. I even restarted the computer and it’s still there (cortana tells me that she’s going to pick up where I left off). When I open task manager the avast installation programs aren’t doing anything. No cpu cycles. No memory. But they will not quit.
I’m literally about to do a system reset. Can someone help me?

Follow instructions: https://www.avast.com/uninstall-utility

Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A