Canceling The System Scan Doesn't Make It Stop

Just ran a System Scan and when i tried to stop and cancel it it still ran in the background taking a great deal of resources making the HDD work 100% and my C: drive hovering around 50%. When i checked process explorer the bd scanner process didn't show and neither on task manager but the I/O was still abruptly high and i believe the scanner was still scanning the drive. It's not the first time this have happened. I am running Windows 10.

This can't be a normal behavior!