While scrolling YouTube I started a video and full screened. The computer had a visual glitch where it wouldn’t properly fullscreen. Ctrl+alt+del wasn’t working and I assumed it was a normal occasional freeze. The issue is once it ended it’s freeze a second mouse appeared and began moving about the desktop and made it’s way to the task bar. It then presumably launched something as the loading circle appeared next to it. To be fair before the crash I was moving my mouse in that area so it may have been a weird echo of my old mouse movements but just to be safe I unplugged the WiFi and turned my computer off. Thoughts on if this was a visual bug to go with the computer freeze or the freeze came from someone connecting remotely to my computer?