I pay for AVG Internet Security, and yesterday morning I opened the program because it grabbed a Steam .exe and quarantined it. When I opened it, I noticed it had started am Explorer Scan automatically when I opened the program. I immediately noticed a huge performance drop in my PC, and my task manager says AVG Service is using a good chunk of my CPU and Disk, over 50% in both cases. The main issue I have is the scan will not finish. It has been well over 24 hours, and even fully powering down the PC does not stop, as it starts again when I turn on the PC. Next to the display saying 'Explorer Scan is Running' the button 'See Details' shows up nothing, just a blank page that never loads even when I left it for over an hour. The progress on the scan says 100% according to the main page, but it will not finish is killing my PC.
Is there any obvious fix I'm missing, or do I just need to completely remove AVG and reinstall it?